Custom Rectangular duct adapter STL 3D file 243x33 mm to 229x28 mm – transition: 20 mm 📦#9373

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Rectangular duct sleeve downloadable as STL 3D file. Side A uses an internal cross-section of 243x33 mm (rectangular), whereas side B is 229x28 mm (rectangular). The sleeve insertion length is the same on both sides, 25 mm. The transition section between the two sides is 20 mm long, for an overall length of 70 mm (side A sleeve, transition and side B sleeve). The outer edges at the ends are chamfered, which simplifies inserting the adapter into the mating duct.
Generation date: 2026-06-09
3D Model Rectangular duct adapter STL 3D file 243x33 mm to 229x28 mm – transition: 20 mm

3D model download

Free
  • rectangular-to-rectangular-duc_model9373-nb0_dd{id}.stl : 272.5 Ko
STL Mesh quality : Linear deflection 0.0005 Angular deflection 0.05
No compliance warranty No compliance warranty
(Internal and private use, non-commercial – no distribution – no derivatives)
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Values for this model

This model was generated by the Rectangular-to-rectangular duct adapter template, with the following values:
Parameter Value
#1 side A internal width 243 mm (≃9 9/16 in)
#2 side A internal height 33 mm (≃1 5/16 in)
#3 sleeve length on side A 25 mm (≃0.98 in)
#4 side B internal width 229 mm (≃9.02 in)
#5 side B internal height 28 mm (≃1.10 in)
#6 sleeve length on side B 25 mm (≃0.98 in)
#7 thickness 3 mm (≃1/8 in)
#8 transition length 20 mm (≃0.79 in)
#9 Y offset 0 mm (0 in)
#10 Z offset 0 mm (0 in)
#11 end chamfers outside
Metadata Value
external width on side A 249 mm (≃9 13/16 in)
external height on side A 39 mm (≃1.54 in)
external width on side B 235 mm (≃9 1/4 in)
external height on side B 34 mm (≃1.34 in)
total length 70 mm (≃2 3/4 in)
illustration of the parameters
Parameter overview

Labels are used in the naming of the downloaded 3D files.

Parameter Label
#1 side A internal width widRA
#2 side A internal height heiRA
#3 sleeve length on side A lenSA
#4 side B internal width widRB
#5 side B internal height heiRB
#6 sleeve length on side B lenSB
#7 thickness thi
#8 transition length tra
#9 Y offset ofsY
#10 Z offset ofsZ
#11 end chamfers cha

Related 3D models

To search for a model based on your own parameters, go to the template page Rectangular-to-rectangular duct adapter 

Rectangular tube adapter STL file 243x33 mm to 234x30 mm – transition: 20 mm (📦 #9372)

1 object(s) - format STL
Rectangular tube adapter STL file 243x33 mm to 234x30 mm – transition: 20 mm
Rectangular duct fitting exported as STL 3D file. The internal cross-section on side A is 243x33 mm (rectangular), while side B is 234x30 mm (rectangular). The sleeve insertion length is the same on both sides, 25 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 70 mm. External chamfers are added at the ends to make it easier to push the adapter into ducts or pipes.
Parameter Value Unit
side A internal width 243 mm
side A internal height 33 mm
sleeve length on side A 25 mm
side B internal width 234 mm
side B internal height 30 mm
sleeve length on side B 25 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular tube adapter STL 3D file 243x33 mm to 234x30 mm – transition: 20 mm (📦 #9371)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 243x33 mm to 234x30 mm – transition: 20 mm
3D STL file for rectangular adapter. Side A offers an internal cross-section of 243x33 mm (rectangular) and side B uses 234x30 mm (rectangular). On side A, the sleeve length is 25 mm, and on side B it is 26.5 mm. The transition section runs for 20 mm and the overall length is 71.5 mm, sleeves included. External chamfers at the ends help the adapter slide and seat more easily in the duct system.
Parameter Value Unit
side A internal width 243 mm
side A internal height 33 mm
sleeve length on side A 25 mm
side B internal width 234 mm
side B internal height 30 mm
sleeve length on side B 26.5 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular tube adapter STL file 225x95 mm to 150x75 mm – transition: 50 mm (📦 #4766)

1 object(s) - format STL
Rectangular tube adapter STL file 225x95 mm to 150x75 mm – transition: 50 mm
Rectangular vent adapter provided as 3D STL file. The internal cross-section on side A is 225x95 mm (rectangular), while side B is 150x75 mm (rectangular). Each sleeve provides an insertion length of 10 mm. Between the two sleeves, the transition section adds 50 mm, giving an overall length of 70 mm. The outer edges at the ends are chamfered, which simplifies inserting the adapter into the mating duct.
Parameter Value Unit
side A internal width 225 mm
side A internal height 95 mm
sleeve length on side A 10 mm
side B internal width 150 mm
side B internal height 75 mm
sleeve length on side B 10 mm
thickness 3 mm
transition length 50 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular tube adapter STL 3D file 220x83 mm to 150x75 mm – transition: 70 mm (📦 #4772)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 220x83 mm to 150x75 mm – transition: 70 mm
3D STL file for rectangular duct transition. Side A offers an internal cross-section of 220x83 mm (rectangular) and side B uses 150x75 mm (rectangular). On side A, the sleeve length is 30 mm, and on side B it is 20 mm. The transition section runs for 70 mm and the overall length is 120 mm, sleeves included. External chamfers at the ends help the adapter slide and seat more easily in the duct system.
Parameter Value Unit
side A internal width 220 mm
side A internal height 83 mm
sleeve length on side A 30 mm
side B internal width 150 mm
side B internal height 75 mm
sleeve length on side B 20 mm
thickness 2 mm
transition length 70 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular pipe adapter STL 3D file 225x90 mm to 150x75 mm – transition: 100 mm (📦 #4769)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 225x90 mm to 150x75 mm – transition: 100 mm
Rectangular duct connector downloadable as STL 3D file. The internal cross-section on side A is 225x90 mm (rectangular), while side B is 150x75 mm (rectangular). On side A, the sleeve length is 35 mm, and on side B it is 20 mm. Between the two sleeves, the transition section adds 100 mm, giving an overall length of 155 mm. External chamfers at the ends help the adapter slide and seat more easily in the duct system.
Parameter Value Unit
side A internal width 225 mm
side A internal height 90 mm
sleeve length on side A 35 mm
side B internal width 150 mm
side B internal height 75 mm
sleeve length on side B 20 mm
thickness 2 mm
transition length 100 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangle-to-rectangle duct adapter STL 3D file 193x73 mm to 193x73 mm – transition: 100 mm (📦 #4074)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 193x73 mm to 193x73 mm – transition: 100 mm
3D STL file for rectangular pipe adapter. On both side A and side B, the internal cross-section is 193x73 mm, with a rectangular geometry. The sleeve insertion length is the same on both sides, 50 mm. The transition section between the two sides is 100 mm long, for an overall length of 200 mm (side A sleeve, transition and side B sleeve). The outer edges at the ends are chamfered, which simplifies inserting the adapter into the mating duct.
Parameter Value Unit
side A internal width 193 mm
side A internal height 73 mm
sleeve length on side A 50 mm
side B internal width 193 mm
side B internal height 73 mm
sleeve length on side B 50 mm
thickness 3 mm
transition length 100 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangle-to-rectangle duct adapter STL 3D file 220x90 mm to 180x95 mm – transition: 30 mm (📦 #3980)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 220x90 mm to 180x95 mm – transition: 30 mm
3D STL file for rectangular adapter. Side A uses an internal cross-section of 220x90 mm (rectangular), whereas side B is 180x95 mm (rectangular). Both side A and side B sleeves share the same insertion length of 40 mm. The transition section between the two sides is 30 mm long, for an overall length of 110 mm (side A sleeve, transition and side B sleeve). Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 40 mm
side B internal width 180 mm
side B internal height 95 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL file 200x20 mm to 100x50 mm – transition: 50 mm (📦 #4704)

1 object(s) - format STL
Rectangular tube adapter STL file 200x20 mm to 100x50 mm – transition: 50 mm
Rectangular adapter provided as 3D STL file. Side A offers an internal cross-section of 200x20 mm (rectangular) and side B uses 100x50 mm (rectangular). The sleeve insertion length is the same on both sides, 20 mm. The transition section runs for 50 mm and the overall length is 90 mm, sleeves included. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 200 mm
side A internal height 20 mm
sleeve length on side A 20 mm
side B internal width 100 mm
side B internal height 50 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 50 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL 3D file 200x20 mm to 100x50 mm – transition: 50 mm (📦 #4700)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 200x20 mm to 100x50 mm – transition: 50 mm
Rectangular duct adapter provided as 3D STL file. The internal cross-section on side A is 200x20 mm (rectangular), while side B is 100x50 mm (rectangular). Each sleeve provides an insertion length of 20 mm. Between the two sleeves, the transition section adds 50 mm, giving an overall length of 90 mm. Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct. An offset of 25 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 200 mm
side A internal height 20 mm
sleeve length on side A 20 mm
side B internal width 100 mm
side B internal height 50 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 50 mm
Y offset 0 mm
Z offset 25 mm
end chamfers inside

Rectangular pipe adapter STL file 300x21 mm to 100x42 mm – transition: 20 mm (📦 #9130)

1 object(s) - format STL
Rectangular pipe adapter STL file 300x21 mm to 100x42 mm – transition: 20 mm
Rectangular vent adapter provided as 3D STL file. The internal cross-section on side A is 300x21 mm (rectangular), while side B is 100x42 mm (rectangular). Both side A and side B sleeves share the same insertion length of 10 mm. The transition section between the two sides is 20 mm long, for an overall length of 40 mm (side A sleeve, transition and side B sleeve). Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 300 mm
side A internal height 21 mm
sleeve length on side A 10 mm
side B internal width 100 mm
side B internal height 42 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL file 220x90 mm to 220x40 mm – transition: 100 mm (📦 #9230)

1 object(s) - format STL
Rectangular pipe adapter STL file 220x90 mm to 220x40 mm – transition: 100 mm
Rectangular adapter exported as STL 3D file. Side A offers an internal cross-section of 220x90 mm (rectangular) and side B uses 220x40 mm (rectangular). On side A, the sleeve length is 30 mm, and on side B it is 50 mm. The transition section between the two sides is 100 mm long, for an overall length of 180 mm (side A sleeve, transition and side B sleeve). External chamfers are added at the ends to make it easier to push the adapter into ducts or pipes. Side B is offset by 50 mm along the Y axis relative to side A.
Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 30 mm
side B internal width 220 mm
side B internal height 40 mm
sleeve length on side B 50 mm
thickness 3 mm
transition length 100 mm
Y offset 50 mm
Z offset 0 mm
end chamfers outside

Rectangular pipe adapter STL file 90x90 mm to 200x20 mm – transition: 20 mm (📦 #5016)

1 object(s) - format STL
Rectangular pipe adapter STL file 90x90 mm to 200x20 mm – transition: 20 mm
Rectangular adapter downloadable as STL 3D file. The internal cross-section on side A is 90x90 mm (square), while side B is 200x20 mm (rectangular). The sleeve on side A provides an insertion length of 15 mm, and the sleeve on side B 10 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 45 mm. Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct.
Parameter Value Unit
side A internal width 90 mm
side A internal height 90 mm
sleeve length on side A 15 mm
side B internal width 200 mm
side B internal height 20 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL 3D file 122.3x60.3 mm to 116.3x56.3 mm – transition: 20 mm (📦 #7193)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 122.3x60.3 mm to 116.3x56.3 mm – transition: 20 mm
Rectangular duct fitting provided as 3D STL file. The internal cross-section on side A is 122.3x60.3 mm (rectangular), while side B is 116.3x56.3 mm (rectangular). The insertion length on side A is 25 mm, while on side B it is 30 mm. The transition section runs for 20 mm and the overall length is 75 mm, sleeves included. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 122.3 mm
side A internal height 60.3 mm
sleeve length on side A 25 mm
side B internal width 116.3 mm
side B internal height 56.3 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL file 122.3x60.3 mm to 116x56 mm – transition: 20 mm (📦 #7196)

1 object(s) - format STL
Rectangular pipe adapter STL file 122.3x60.3 mm to 116x56 mm – transition: 20 mm
3D STL file for rectangular duct connector. Side A uses an internal cross-section of 122.3x60.3 mm (rectangular), whereas side B is 116x56 mm (rectangular). The sleeve on side A provides an insertion length of 25 mm, and the sleeve on side B 30 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 75 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 122.3 mm
side A internal height 60.3 mm
sleeve length on side A 25 mm
side B internal width 116 mm
side B internal height 56 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL file 220x90 mm to 180x95 mm – transition: 100 mm (📦 #3989)

1 object(s) - format STL
Rectangular duct adapter STL file 220x90 mm to 180x95 mm – transition: 100 mm
3D STL file for rectangular vent adapter. Side A uses an internal cross-section of 220x90 mm (rectangular), whereas side B is 180x95 mm (rectangular). Each sleeve provides an insertion length of 30 mm. The transition section between the two sides is 100 mm long, for an overall length of 160 mm (side A sleeve, transition and side B sleeve). External chamfers at the ends help the adapter slide and seat more easily in the duct system. Relative to side A, side B is shifted by 50 mm along the Y axis.
Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 30 mm
side B internal width 180 mm
side B internal height 95 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 100 mm
Y offset 50 mm
Z offset 0 mm
end chamfers outside

Rectangle-to-rectangle duct adapter STL 3D file 90x90 mm to 200x20 mm – transition: 50 mm (📦 #5019)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 90x90 mm to 200x20 mm – transition: 50 mm
Rectangular adapter exported as STL 3D file. Side A uses an internal cross-section of 90x90 mm (square), whereas side B is 200x20 mm (rectangular). The insertion length on side A is 15 mm, while on side B it is 10 mm. The transition section between the two sides is 50 mm long, for an overall length of 75 mm (side A sleeve, transition and side B sleeve). Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct. Relative to side A, side B is shifted by 25 mm along the Z axis.
Parameter Value Unit
side A internal width 90 mm
side A internal height 90 mm
sleeve length on side A 15 mm
side B internal width 200 mm
side B internal height 20 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 50 mm
Y offset 0 mm
Z offset 25 mm
end chamfers inside

Rectangle-to-rectangle duct adapter STL file 104x34 mm to 100x30 mm – transition: 50 mm (📦 #4929)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL file 104x34 mm to 100x30 mm – transition: 50 mm
Rectangular pipe adapter downloadable as STL 3D file. The internal cross-section on side A is 104x34 mm (rectangular), while side B is 100x30 mm (rectangular). The insertion length on side A is 25 mm, while on side B it is 15 mm. The transition section runs for 50 mm and the overall length is 90 mm, sleeves included. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 104 mm
side A internal height 34 mm
sleeve length on side A 25 mm
side B internal width 100 mm
side B internal height 30 mm
sleeve length on side B 15 mm
thickness 2 mm
transition length 50 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL file 90x90 mm to 200x20 mm – transition: 60 mm (📦 #5020)

1 object(s) - format STL
Rectangular duct adapter STL file 90x90 mm to 200x20 mm – transition: 60 mm
Rectangular duct connector exported as STL 3D file. The internal cross-section on side A is 90x90 mm (square), while side B is 200x20 mm (rectangular). The sleeve on side A provides an insertion length of 15 mm, and the sleeve on side B 10 mm. The transition section between the two sides is 60 mm long, for an overall length of 85 mm (side A sleeve, transition and side B sleeve). Internal chamfers are added at the ends to make assembly and duct insertion easier. An offset of 30 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 90 mm
side A internal height 90 mm
sleeve length on side A 15 mm
side B internal width 200 mm
side B internal height 20 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 60 mm
Y offset 0 mm
Z offset 30 mm
end chamfers inside

Rectangular tube adapter STL file 220x90 mm to 180x95 mm – transition: 110 mm (📦 #3986)

1 object(s) - format STL
Rectangular tube adapter STL file 220x90 mm to 180x95 mm – transition: 110 mm
3D STL file for rectangular duct connector. Side A offers an internal cross-section of 220x90 mm (rectangular) and side B uses 180x95 mm (rectangular). Each sleeve provides an insertion length of 30 mm. The transition section between the two sides is 110 mm long, for an overall length of 170 mm (side A sleeve, transition and side B sleeve). The outer edges at the ends are chamfered, which simplifies inserting the adapter into the mating duct. Relative to side A, side B is shifted by 55 mm along the Y axis.
Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 30 mm
side B internal width 180 mm
side B internal height 95 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 110 mm
Y offset 55 mm
Z offset 0 mm
end chamfers outside

Rectangular duct adapter STL file 155x109.3 mm to 91x45.3 mm – transition: 47.3 mm (📦 #4400)

1 object(s) - format STL
Rectangular duct adapter STL file 155x109.3 mm to 91x45.3 mm – transition: 47.3 mm
Rectangular duct fitting downloadable as STL 3D file. The internal cross-section on side A is 155x109.3 mm (rectangular), while side B is 91x45.3 mm (rectangular). The insertion length on side A is 10 mm, while on side B it is 52.7 mm. The transition section runs for 47.3 mm and the overall length is 110 mm, sleeves included. External chamfers are added at the ends to make it easier to push the adapter into ducts or pipes.
Parameter Value Unit
side A internal width 155 mm
side A internal height 109.3 mm
sleeve length on side A 10 mm
side B internal width 91 mm
side B internal height 45.3 mm
sleeve length on side B 52.7 mm
thickness 2 mm
transition length 47.3 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangle-to-rectangle duct adapter STL 3D file 200x150 mm to 180x100.4 mm – transition: 20 mm (📦 #9333)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 200x150 mm to 180x100.4 mm – transition: 20 mm
Rectangular duct fitting downloadable as STL 3D file. Side A uses an internal cross-section of 200x150 mm (rectangular), whereas side B is 180x100.4 mm (rectangular). The sleeve on side A provides an insertion length of 5 mm, and the sleeve on side B 20 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 45 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 200 mm
side A internal height 150 mm
sleeve length on side A 5 mm
side B internal width 180 mm
side B internal height 100.4 mm
sleeve length on side B 20 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL 3D file 155x109.3 mm to 86x40.3 mm – transition: 47.3 mm (📦 #4407)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 155x109.3 mm to 86x40.3 mm – transition: 47.3 mm
Rectangular vent adapter downloadable as STL 3D file. The internal cross-section on side A is 155x109.3 mm (rectangular), while side B is 86x40.3 mm (rectangular). The insertion length on side A is 10 mm, while on side B it is 52.7 mm. Between the two sleeves, the transition section adds 47.3 mm, giving an overall length of 110 mm. The outer edges at the ends are chamfered, which simplifies inserting the adapter into the mating duct.
Parameter Value Unit
side A internal width 155 mm
side A internal height 109.3 mm
sleeve length on side A 10 mm
side B internal width 86 mm
side B internal height 40.3 mm
sleeve length on side B 52.7 mm
thickness 2 mm
transition length 47.3 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular tube adapter STL file 115x115 mm to 225x90 mm – transition: 140 mm (📦 #7034)

1 object(s) - format STL
Rectangular tube adapter STL file 115x115 mm to 225x90 mm – transition: 140 mm
3D STL file for rectangular duct sleeve. Side A offers an internal cross-section of 115x115 mm (square) and side B uses 225x90 mm (rectangular). Each sleeve provides an insertion length of 40 mm. Between the two sleeves, the transition section adds 140 mm, giving an overall length of 220 mm. External chamfers at the ends help the adapter slide and seat more easily in the duct system.
Parameter Value Unit
side A internal width 115 mm
side A internal height 115 mm
sleeve length on side A 40 mm
side B internal width 225 mm
side B internal height 90 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 140 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular pipe adapter STL 3D file 90x90 mm to 200x20 mm – transition: 70 mm (📦 #5022)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 90x90 mm to 200x20 mm – transition: 70 mm
Rectangular conduit adapter provided as 3D STL file. The internal cross-section on side A is 90x90 mm (square), while side B is 200x20 mm (rectangular). The sleeve on side A provides an insertion length of 15 mm, and the sleeve on side B 10 mm. Between the two sleeves, the transition section adds 70 mm, giving an overall length of 95 mm. The internal edges at the ends are chamfered to help guide the duct during insertion. Relative to side A, side B is shifted by 35 mm along the Z axis.
Parameter Value Unit
side A internal width 90 mm
side A internal height 90 mm
sleeve length on side A 15 mm
side B internal width 200 mm
side B internal height 20 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 70 mm
Y offset 0 mm
Z offset 35 mm
end chamfers inside

Rectangular duct adapter STL file 120x40 mm to 120x40 mm – transition: 80 mm (📦 #3965)

1 object(s) - format STL
Rectangular duct adapter STL file 120x40 mm to 120x40 mm – transition: 80 mm
Rectangular adapter downloadable as STL 3D file. Side A and side B share the same internal cross-section, 120x40 mm, with a rectangular profile. Each sleeve provides an insertion length of 20 mm. The transition section between the two sides is 80 mm long, for an overall length of 120 mm (side A sleeve, transition and side B sleeve). The internal edges at the ends are chamfered to help guide the duct during insertion. An offset of 40 mm along the Y axis and 30 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 120 mm
side A internal height 40 mm
sleeve length on side A 20 mm
side B internal width 120 mm
side B internal height 40 mm
sleeve length on side B 20 mm
thickness 3 mm
transition length 80 mm
Y offset 40 mm
Z offset 30 mm
end chamfers inside

Rectangle-to-rectangle duct adapter STL file 200x20 mm to 100x50 mm – transition: 55 mm (📦 #4707)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL file 200x20 mm to 100x50 mm – transition: 55 mm
Rectangular duct fitting provided as 3D STL file. Side A uses an internal cross-section of 200x20 mm (rectangular), whereas side B is 100x50 mm (rectangular). The sleeve insertion length is the same on both sides, 30 mm. Between the two sleeves, the transition section adds 55 mm, giving an overall length of 115 mm. Inner and outer edges at both ends are left unchamfered. An offset of 12.7 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 200 mm
side A internal height 20 mm
sleeve length on side A 30 mm
side B internal width 100 mm
side B internal height 50 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 55 mm
Y offset 0 mm
Z offset 12.7 mm
end chamfers none

Rectangular tube adapter STL 3D file 220x73 mm to 220x73 mm – transition: 120 mm (📦 #4273)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 220x73 mm to 220x73 mm – transition: 120 mm
Rectangular adapter provided as 3D STL file. Side A and side B share the same internal cross-section, 220x73 mm, with a rectangular profile. Each sleeve provides an insertion length of 50 mm. The transition section between the two sides is 120 mm long, for an overall length of 220 mm (side A sleeve, transition and side B sleeve). No chamfers are applied at the ends; both inner and outer edges remain sharp.
Parameter Value Unit
side A internal width 220 mm
side A internal height 73 mm
sleeve length on side A 50 mm
side B internal width 220 mm
side B internal height 73 mm
sleeve length on side B 50 mm
thickness 3 mm
transition length 120 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

Rectangular pipe adapter STL 3D file 77x34 mm to 77x34 mm – transition: 30 mm (📦 #4959)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 77x34 mm to 77x34 mm – transition: 30 mm
Rectangular duct adapter exported as STL 3D file. On both side A and side B, the internal cross-section is 77x34 mm, with a rectangular geometry. Both side A and side B sleeves share the same insertion length of 30 mm. Between the two sleeves, the transition section adds 30 mm, giving an overall length of 90 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 77 mm
side A internal height 34 mm
sleeve length on side A 30 mm
side B internal width 77 mm
side B internal height 34 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside