Custom Rectangular tube adapter STL file 100x100 mm to 35x35 mm – transition: 30 mm 📦#4994

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Rectangular pipe adapter downloadable as STL 3D file. The internal cross-section on side A is 100x100 mm (square), while side B is 35x35 mm (square). 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 30 mm long, for an overall length of 110 mm (side A sleeve, transition and side B sleeve). The internal edges at the ends are chamfered to help guide the duct during insertion.
Generation date: 2025-12-19
3D Model Rectangular tube adapter STL file 100x100 mm to 35x35 mm – transition: 30 mm

3D model download

Free
  • rectangular-to-rectangular-duc_model4994-nb0_dd{id}.stl : 1.5 Mo
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 100 mm (≃3 15/16 in)
#2 side A internal height 100 mm (≃3 15/16 in)
#3 sleeve length on side A 30 mm (≃1 3/16 in)
#4 side B internal width 35 mm (≃1 3/8 in)
#5 side B internal height 35 mm (≃1 3/8 in)
#6 sleeve length on side B 50 mm (≃1.97 in)
#7 thickness 2 mm (≃0.08 in)
#8 transition length 30 mm (≃1 3/16 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 104 mm (≃4.09 in)
external height on side A 104 mm (≃4.09 in)
external width on side B 39 mm (≃1.54 in)
external height on side B 39 mm (≃1.54 in)
total length 110 mm (≃4.33 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 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

Rectangular pipe adapter STL 3D file 77x34 mm to 34x77 mm – transition: 30 mm (📦 #4958)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 77x34 mm to 34x77 mm – transition: 30 mm
Rectangular adapter downloadable as STL 3D file. The internal cross-section on side A is 77x34 mm (rectangular), while side B is 34x77 mm (rectangular). Each sleeve provides an 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 34 mm
side B internal height 77 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

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 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 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

Rectangle-to-rectangle duct adapter STL file 100x100 mm to 50.5x50.5 mm – transition: 25 mm (📦 #5839)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL file 100x100 mm to 50.5x50.5 mm – transition: 25 mm
3D STL file for rectangular vent adapter. Side A uses an internal cross-section of 100x100 mm (square), whereas side B is 50.5x50.5 mm (square). The sleeve on side A provides an insertion length of 50 mm, and the sleeve on side B 25 mm. The transition section between the two sides is 25 mm long, for an overall length of 100 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 100 mm
side A internal height 100 mm
sleeve length on side A 50 mm
side B internal width 50.5 mm
side B internal height 50.5 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 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

Rectangle-to-rectangle duct adapter STL 3D file 111.4x54.4 mm to 110.4x54.4 mm – transition: 20 mm (📦 #9918)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 111.4x54.4 mm to 110.4x54.4 mm – transition: 20 mm
Rectangular adapter exported as STL 3D file. Side A uses an internal cross-section of 111.4x54.4 mm (rectangular), whereas side B is 110.4x54.4 mm (rectangular). Both side A and side B sleeves share the same insertion length of 25 mm. The transition section runs for 20 mm and the overall length is 70 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 111.4 mm
side A internal height 54.4 mm
sleeve length on side A 25 mm
side B internal width 110.4 mm
side B internal height 54.4 mm
sleeve length on side B 25 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular pipe adapter STL file 71x71 mm to 71x20 mm – transition: 50 mm (📦 #4029)

1 object(s) - format STL
Rectangular pipe adapter STL file 71x71 mm to 71x20 mm – transition: 50 mm
Rectangular duct connector provided as 3D STL file. Side A uses an internal cross-section of 71x71 mm (square), whereas side B is 71x20 mm (rectangular). The sleeve on side A provides an insertion length of 20 mm, and the sleeve on side B 70 mm. The transition section runs for 50 mm and the overall length is 140 mm, sleeves included. The ends are left without chamfers, with sharp inner and outer edges.
Parameter Value Unit
side A internal width 71 mm
side A internal height 71 mm
sleeve length on side A 20 mm
side B internal width 71 mm
side B internal height 20 mm
sleeve length on side B 70 mm
thickness 2 mm
transition length 50 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

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

Rectangle-to-rectangle duct adapter STL file 96x51.2 mm to 40x26.2 mm – transition: 55 mm (📦 #4478)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL file 96x51.2 mm to 40x26.2 mm – transition: 55 mm
3D STL file for rectangular vent adapter. The internal cross-section on side A is 96x51.2 mm (rectangular), while side B is 40x26.2 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. The ends are left without chamfers, with sharp inner and outer edges. An offset of 12.5 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 96 mm
side A internal height 51.2 mm
sleeve length on side A 30 mm
side B internal width 40 mm
side B internal height 26.2 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 55 mm
Y offset 0 mm
Z offset 12.5 mm
end chamfers none

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

Rectangular duct adapter STL file 91.2x46.4 mm to 40x21 mm – transition: 55 mm (📦 #4479)

1 object(s) - format STL
Rectangular duct adapter STL file 91.2x46.4 mm to 40x21 mm – transition: 55 mm
Rectangular duct connector downloadable as STL 3D file. Side A offers an internal cross-section of 91.2x46.4 mm (rectangular) and side B uses 40x21 mm (rectangular). Each sleeve provides an insertion length of 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 91.2 mm
side A internal height 46.4 mm
sleeve length on side A 30 mm
side B internal width 40 mm
side B internal height 21 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 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 duct adapter STL file 100x60 mm to 100x60 mm – transition: 20 mm (📦 #6424)

1 object(s) - format STL
Rectangular duct adapter STL file 100x60 mm to 100x60 mm – transition: 20 mm
Rectangular pipe adapter provided as 3D STL file. Side A and side B share the same internal cross-section, 100x60 mm, with a rectangular profile. The sleeve on side A provides an insertion length of 30 mm, and the sleeve on side B 70 mm. Between the two sleeves, the transition section adds 20 mm, giving an overall length of 120 mm. The ends are left without chamfers, with sharp inner and outer edges.
Parameter Value Unit
side A internal width 100 mm
side A internal height 60 mm
sleeve length on side A 30 mm
side B internal width 100 mm
side B internal height 60 mm
sleeve length on side B 70 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

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 pipe adapter STL 3D file 96x51.2 mm to 40x23.2 mm – transition: 60 mm (📦 #4438)

1 object(s) - format STL
Rectangular pipe adapter STL 3D file 96x51.2 mm to 40x23.2 mm – transition: 60 mm
Rectangular duct connector downloadable as STL 3D file. The internal cross-section on side A is 96x51.2 mm (rectangular), while side B is 40x23.2 mm (rectangular). The sleeve insertion length is the same on both sides, 30 mm. The transition section runs for 60 mm and the overall length is 120 mm, sleeves included. No chamfers are applied at the ends; both inner and outer edges remain sharp. Side B is offset by 24 mm along the Z axis relative to side A.
Parameter Value Unit
side A internal width 96 mm
side A internal height 51.2 mm
sleeve length on side A 30 mm
side B internal width 40 mm
side B internal height 23.2 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 60 mm
Y offset 0 mm
Z offset 24 mm
end chamfers none

Rectangular duct adapter STL 3D file 96x51.2 mm to 40x26.2 mm – transition: 55 mm (📦 #4439)

1 object(s) - format STL
Rectangular duct adapter STL 3D file 96x51.2 mm to 40x26.2 mm – transition: 55 mm
Rectangular duct transition downloadable as STL 3D file. The internal cross-section on side A is 96x51.2 mm (rectangular), while side B is 40x26.2 mm (rectangular). Both side A and side B sleeves share the same insertion length of 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. Relative to side A, side B is shifted by 25 mm along the Z axis.
Parameter Value Unit
side A internal width 96 mm
side A internal height 51.2 mm
sleeve length on side A 30 mm
side B internal width 40 mm
side B internal height 26.2 mm
sleeve length on side B 30 mm
thickness 2 mm
transition length 55 mm
Y offset 0 mm
Z offset 25 mm
end chamfers none

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 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

Rectangle-to-rectangle duct adapter STL 3D file 96x51.2 mm to 50x26 mm – transition: 38 mm (📦 #4437)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 96x51.2 mm to 50x26 mm – transition: 38 mm
Rectangular conduit adapter provided as 3D STL file. Side A offers an internal cross-section of 96x51.2 mm (rectangular) and side B uses 50x26 mm (rectangular). The sleeve insertion length is the same on both sides, 20 mm. The transition section runs for 38 mm and the overall length is 78 mm, sleeves included. Wall thickness is minimal at 1 mm. Inner and outer edges at both ends are left unchamfered.
Parameter Value Unit
side A internal width 96 mm
side A internal height 51.2 mm
sleeve length on side A 20 mm
side B internal width 50 mm
side B internal height 26 mm
sleeve length on side B 20 mm
thickness 1 mm
transition length 38 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

Rectangular tube adapter STL file 79x33 mm to 62x24 mm – transition: 20 mm (📦 #4059)

1 object(s) - format STL
Rectangular tube adapter STL file 79x33 mm to 62x24 mm – transition: 20 mm
Rectangular duct fitting exported as STL 3D file. Side A offers an internal cross-section of 79x33 mm (rectangular) and side B uses 62x24 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). The internal edges at the ends are chamfered to help guide the duct during insertion.
Parameter Value Unit
side A internal width 79 mm
side A internal height 33 mm
sleeve length on side A 10 mm
side B internal width 62 mm
side B internal height 24 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