Custom Rectangular tube adapter STL 3D file 87x202 mm to 90x220 mm – transition: 20 mm 📦#8885

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3D STL file for rectangular conduit adapter. Side A uses an internal cross-section of 87x202 mm (rectangular), whereas side B is 90x220 mm (rectangular). The sleeve insertion length is the same on both sides, 20 mm. The transition section runs for 20 mm and the overall length is 60 mm, sleeves included. Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct.
Generation date: 2026-05-11
3D Model Rectangular tube adapter STL 3D file 87x202 mm to 90x220 mm – transition: 20 mm

3D model download

Free
  • rectangular-to-rectangular-duc_model8885-nb0_dd{id}.stl : 47 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 87 mm (≃3 7/16 in)
#2 side A internal height 202 mm (≃7 15/16 in)
#3 sleeve length on side A 20 mm (≃0.79 in)
#4 side B internal width 90 mm (≃3.54 in)
#5 side B internal height 220 mm (≃8.66 in)
#6 sleeve length on side B 20 mm (≃0.79 in)
#7 thickness 2 mm (≃0.08 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 inside
Metadata Value
external width on side A 91 mm (≃3.58 in)
external height on side A 206 mm (≃8 1/8 in)
external width on side B 94 mm (≃3 11/16 in)
external height on side B 224 mm (≃8 13/16 in)
total length 60 mm (≃2 3/8 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 pipe adapter STL 3D file 150x150 mm to 150x150 mm – transition: 20 mm (📦 #7850)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 150x150 mm to 150x150 mm – transition: 20 mm
Rectangular duct sleeve exported as STL 3D file. Both ends have the same internal cross-section, 150x150 mm, with a square shape. Each sleeve provides an insertion length of 35 mm. The transition section runs for 20 mm and the overall length is 90 mm, sleeves included. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 150 mm
side A internal height 150 mm
sleeve length on side A 35 mm
side B internal width 150 mm
side B internal height 150 mm
sleeve length on side B 35 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL 3D file 150x150 mm to 150x150 mm – transition: 90 mm (📦 #7849)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 150x150 mm to 150x150 mm – transition: 90 mm
Rectangular pipe adapter downloadable as STL 3D file. Both ends have the same internal cross-section, 150x150 mm, with a square shape. Each sleeve provides an insertion length of 45 mm. The transition section runs for 90 mm and the overall length is 180 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 150 mm
side A internal height 150 mm
sleeve length on side A 45 mm
side B internal width 150 mm
side B internal height 150 mm
sleeve length on side B 45 mm
thickness 2 mm
transition length 90 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL 3D file 242x138 mm to 124.6x129 mm – transition: 40 mm (📦 #5968)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 242x138 mm to 124.6x129 mm – transition: 40 mm
Rectangular duct sleeve provided as 3D STL file. The internal cross-section on side A is 242x138 mm (rectangular), while side B is 124.6x129 mm (rectangular). Each sleeve provides an insertion length of 5 mm. The transition section runs for 40 mm and the overall length is 50 mm, sleeves included. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 242 mm
side A internal height 138 mm
sleeve length on side A 5 mm
side B internal width 124.6 mm
side B internal height 129 mm
sleeve length on side B 5 mm
thickness 2 mm
transition length 40 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL file 242x138 mm to 123.6x128 mm – transition: 40 mm (📦 #5904)

1 object(s) - format STL
Rectangular tube adapter STL file 242x138 mm to 123.6x128 mm – transition: 40 mm
Rectangular adapter exported as STL 3D file. The internal cross-section on side A is 242x138 mm (rectangular), while side B is 123.6x128 mm (rectangular). Both side A and side B sleeves share the same insertion length of 5 mm. The transition section between the two sides is 40 mm long, for an overall length of 50 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 242 mm
side A internal height 138 mm
sleeve length on side A 5 mm
side B internal width 123.6 mm
side B internal height 128 mm
sleeve length on side B 5 mm
thickness 2 mm
transition length 40 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL 3D file 242x138 mm to 123.6x127 mm – transition: 40 mm (📦 #5903)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 242x138 mm to 123.6x127 mm – transition: 40 mm
Rectangular duct sleeve downloadable as STL 3D file. The internal cross-section on side A is 242x138 mm (rectangular), while side B is 123.6x127 mm (rectangular). The sleeve insertion length is the same on both sides, 5 mm. The transition section between the two sides is 40 mm long, for an overall length of 50 mm (side A sleeve, transition and side B sleeve). The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 242 mm
side A internal height 138 mm
sleeve length on side A 5 mm
side B internal width 123.6 mm
side B internal height 127 mm
sleeve length on side B 5 mm
thickness 2 mm
transition length 40 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL 3D file 242x138 mm to 124.6x129 mm – transition: 60 mm (📦 #5969)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 242x138 mm to 124.6x129 mm – transition: 60 mm
Rectangular duct sleeve downloadable as STL 3D file. The internal cross-section on side A is 242x138 mm (rectangular), while side B is 124.6x129 mm (rectangular). Both side A and side B sleeves share the same insertion length of 5 mm. The transition section between the two sides is 60 mm long, for an overall length of 70 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 242 mm
side A internal height 138 mm
sleeve length on side A 5 mm
side B internal width 124.6 mm
side B internal height 129 mm
sleeve length on side B 5 mm
thickness 2 mm
transition length 60 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL 3D file 120x120 mm to 94x94 mm – transition: 20 mm (📦 #6955)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 120x120 mm to 94x94 mm – transition: 20 mm
Rectangular duct adapter downloadable as STL 3D file. The internal cross-section on side A is 120x120 mm (square), while side B is 94x94 mm (square). The insertion length on side A is 40 mm, while on side B it is 24 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 84 mm. Wall thickness is minimal at 1 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 120 mm
side A internal height 120 mm
sleeve length on side A 40 mm
side B internal width 94 mm
side B internal height 94 mm
sleeve length on side B 24 mm
thickness 1 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL file 246x142 mm to 123.6x124.6 mm – transition: 20 mm (📦 #5901)

1 object(s) - format STL
Rectangular pipe adapter STL file 246x142 mm to 123.6x124.6 mm – transition: 20 mm
Rectangular duct fitting exported as STL 3D file. The internal cross-section on side A is 246x142 mm (rectangular), while side B is 123.6x124.6 mm (rectangular). Both side A and side B sleeves share the same insertion length of 5 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 30 mm. Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct.
Parameter Value Unit
side A internal width 246 mm
side A internal height 142 mm
sleeve length on side A 5 mm
side B internal width 123.6 mm
side B internal height 124.6 mm
sleeve length on side B 5 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 242x138 mm to 123.6x124.6 mm – transition: 40 mm (📦 #5902)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 242x138 mm to 123.6x124.6 mm – transition: 40 mm
3D STL file for rectangular duct adapter. Side A offers an internal cross-section of 242x138 mm (rectangular) and side B uses 123.6x124.6 mm (rectangular). Both side A and side B sleeves share the same insertion length of 5 mm. The transition section between the two sides is 40 mm long, for an overall length of 50 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.
Parameter Value Unit
side A internal width 242 mm
side A internal height 138 mm
sleeve length on side A 5 mm
side B internal width 123.6 mm
side B internal height 124.6 mm
sleeve length on side B 5 mm
thickness 2 mm
transition length 40 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL 3D file 150x150 mm to 220x150 mm – transition: 20 mm (📦 #7852)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 150x150 mm to 220x150 mm – transition: 20 mm
3D STL file for rectangular adapter. The internal cross-section on side A is 150x150 mm (square), while side B is 220x150 mm (rectangular). The sleeve on side A provides an insertion length of 9 mm, and the sleeve on side B 60 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 89 mm. Internal chamfers are added at the ends to make assembly and duct insertion easier.
Parameter Value Unit
side A internal width 150 mm
side A internal height 150 mm
sleeve length on side A 9 mm
side B internal width 220 mm
side B internal height 150 mm
sleeve length on side B 60 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL 3D file 171x108 mm to 100x108 mm – transition: 70 mm (📦 #4757)

1 object(s) - format STL (5.0/5) 1 vote(s)
Rectangular pipe adapter STL 3D file 171x108 mm to 100x108 mm – transition: 70 mm
Rectangular adapter provided as 3D STL file. Side A uses an internal cross-section of 171x108 mm (rectangular), whereas side B is 100x108 mm (rectangular). Both side A and side B sleeves share the same insertion length of 5 mm. The transition section runs for 70 mm and the overall length is 80 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 171 mm
side A internal height 108 mm
sleeve length on side A 5 mm
side B internal width 100 mm
side B internal height 108 mm
sleeve length on side B 5 mm
thickness 3 mm
transition length 70 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL file 120x120 mm to 80x80 mm – transition: 20 mm (📦 #4172)

1 object(s) - format STL
Rectangular pipe adapter STL file 120x120 mm to 80x80 mm – transition: 20 mm
Rectangular duct adapter exported as STL 3D file. Side A offers an internal cross-section of 120x120 mm (square) and side B uses 80x80 mm (square). The sleeve insertion length is the same on both sides, 30 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 80 mm. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 120 mm
side A internal height 120 mm
sleeve length on side A 30 mm
side B internal width 80 mm
side B internal height 80 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL 3D file 110x110 mm to 80x80 mm – transition: 20 mm (📦 #3644)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 110x110 mm to 80x80 mm – transition: 20 mm
Rectangular tube adapter downloadable as STL 3D file. Side A uses an internal cross-section of 110x110 mm (square), whereas side B is 80x80 mm (square). Both side A and side B sleeves share the same insertion length of 30 mm. The transition section runs for 20 mm and the overall length is 80 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 110 mm
side A internal height 110 mm
sleeve length on side A 30 mm
side B internal width 80 mm
side B internal height 80 mm
sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular duct adapter STL 3D file 90x220 mm to 220x90 mm – transition: 25 mm (📦 #4692)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 90x220 mm to 220x90 mm – transition: 25 mm
Rectangular duct sleeve provided as 3D STL file. Side A offers an internal cross-section of 90x220 mm (rectangular) and side B uses 220x90 mm (rectangular). Each sleeve provides an insertion length of 10 mm. The transition section runs for 25 mm and the overall length is 45 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 90 mm
side A internal height 220 mm
sleeve length on side A 10 mm
side B internal width 220 mm
side B internal height 90 mm
sleeve length on side B 10 mm
thickness 2 mm
transition length 25 mm
Y offset 0 mm
Z offset 0 mm
end chamfers outside

Rectangular duct adapter STL 3D file 38x58.6 mm to 80.5x80.5 mm – transition: 30 mm (📦 #5061)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 38x58.6 mm to 80.5x80.5 mm – transition: 30 mm
Rectangular duct fitting exported as STL 3D file. The internal cross-section on side A is 38x58.6 mm (rectangular), while side B is 80.5x80.5 mm (square). The insertion length on side A is 16 mm, while on side B it is 25 mm. The transition section runs for 30 mm and the overall length is 71 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 38 mm
side A internal height 58.6 mm
sleeve length on side A 16 mm
side B internal width 80.5 mm
side B internal height 80.5 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL 3D file 150x150 mm to 55x55 mm – transition: 25 mm (📦 #5825)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 150x150 mm to 55x55 mm – transition: 25 mm
Rectangular duct fitting exported as STL 3D file. The internal cross-section on side A is 150x150 mm (square), while side B is 55x55 mm (square). The insertion length on side A is 50 mm, while on side B it is 25 mm. Between the two sleeves, the transition section adds 25 mm, giving an overall length of 100 mm. The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 150 mm
side A internal height 150 mm
sleeve length on side A 50 mm
side B internal width 55 mm
side B internal height 55 mm
sleeve length on side B 25 mm
thickness 3 mm
transition length 25 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL file 42x58.6 mm to 80.5x80.5 mm – transition: 30 mm (📦 #5063)

1 object(s) - format STL
Rectangular tube adapter STL file 42x58.6 mm to 80.5x80.5 mm – transition: 30 mm
Rectangular pipe adapter downloadable as STL 3D file. Side A uses an internal cross-section of 42x58.6 mm (rectangular), whereas side B is 80.5x80.5 mm (square). On side A, the sleeve length is 16 mm, and on side B it is 25 mm. The transition section runs for 30 mm and the overall length is 71 mm, sleeves included. No chamfers are applied at the ends; both inner and outer edges remain sharp.
Parameter Value Unit
side A internal width 42 mm
side A internal height 58.6 mm
sleeve length on side A 16 mm
side B internal width 80.5 mm
side B internal height 80.5 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

Rectangular pipe adapter STL file 38x54.6 mm to 80.5x80.5 mm – transition: 30 mm (📦 #5064)

1 object(s) - format STL
Rectangular pipe adapter STL file 38x54.6 mm to 80.5x80.5 mm – transition: 30 mm
Rectangular adapter exported as STL 3D file. The internal cross-section on side A is 38x54.6 mm (rectangular), while side B is 80.5x80.5 mm (square). On side A, the sleeve length is 16 mm, and on side B it is 25 mm. The transition section between the two sides is 30 mm long, for an overall length of 71 mm (side A sleeve, transition and side B sleeve). The ends are left without chamfers, with sharp inner and outer edges.
Parameter Value Unit
side A internal width 38 mm
side A internal height 54.6 mm
sleeve length on side A 16 mm
side B internal width 80.5 mm
side B internal height 80.5 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 30 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

Rectangular duct adapter STL 3D file 38x58.6 mm to 80.5x80.5 mm – transition: 30 mm (📦 #5062)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 38x58.6 mm to 80.5x80.5 mm – transition: 30 mm
Rectangular pipe adapter provided as 3D STL file. The internal cross-section on side A is 38x58.6 mm (rectangular), while side B is 80.5x80.5 mm (square). The insertion length on side A is 16 mm, while on side B it is 25 mm. The transition section runs for 30 mm and the overall length is 71 mm, sleeves included. The ends are left without chamfers, with sharp inner and outer edges. Side B is offset by 15 mm along the Y axis and 15 mm along the Z axis relative to side A.
Parameter Value Unit
side A internal width 38 mm
side A internal height 58.6 mm
sleeve length on side A 16 mm
side B internal width 80.5 mm
side B internal height 80.5 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 30 mm
Y offset 15 mm
Z offset 15 mm
end chamfers none

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