Custom Rectangle-to-rectangle duct adapter STL 3D file 164.2x68 mm to 164x67.8 mm – transition: 20 mm 📦#10260

STL Download STL 1
Create a new model expert
from scratch search for a model
Rectangular duct adapter provided as 3D STL file. Side A offers an internal cross-section of 164.2x68 mm (rectangular) and side B uses 164x67.8 mm (rectangular). On side A, the sleeve length is 80 mm, and on side B it is 100 mm. The transition section between the two sides is 20 mm long, for an overall length of 200 mm (side A sleeve, transition and side B sleeve). The shell is kept very light, with only 1 mm wall thickness. The internal edges at the ends are chamfered to help guide the duct during insertion.
Generation date: 2026-07-19
3D Model Rectangle-to-rectangle duct adapter STL 3D file 164.2x68 mm to 164x67.8 mm – transition: 20 mm

3D model download

Free
  • rectangular-to-rectangular-duc_model10260-nb0_dd{id}.stl : 6.3 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)
Safe download
Instant .zip download — no email, no account

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 164.2 mm (≃6.46 in)
#2 side A internal height 68 mm (≃2 11/16 in)
#3 sleeve length on side A 80 mm (≃3.15 in)
#4 side B internal width 164 mm (≃6.46 in)
#5 side B internal height 67.8 mm (≃2.67 in)
#6 sleeve length on side B 100 mm (≃3 15/16 in)
#7 thickness 1 mm (≃0.04 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 166.2 mm (≃6.54 in)
external height on side A 70 mm (≃2 3/4 in)
external width on side B 166 mm (≃6.54 in)
external height on side B 69.8 mm (≃2 3/4 in)
total length 200 mm (≃7 7/8 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 duct adapter STL file 200x120 mm to 200x120 mm – transition: 100 mm (📦 #4495)

1 object(s) - format STL
Rectangular duct adapter STL file 200x120 mm to 200x120 mm – transition: 100 mm
Rectangular tube adapter provided as 3D STL file. On both side A and side B, the internal cross-section is 200x120 mm, with a rectangular geometry. The sleeve insertion length is the same on both sides, 100 mm. The transition section runs for 100 mm and the overall length is 300 mm, sleeves included. 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 120 mm
sleeve length on side A 100 mm
side B internal width 200 mm
side B internal height 120 mm
sleeve length on side B 100 mm
thickness 2 mm
transition length 100 mm
Y offset 0 mm
Z offset 0 mm
end chamfers inside

Rectangular tube adapter STL file 130x130 mm to 130x130 mm – transition: 20 mm (📦 #4812)

1 object(s) - format STL
Rectangular tube adapter STL file 130x130 mm to 130x130 mm – transition: 20 mm
3D STL file for rectangular conduit adapter. Side A and side B share the same internal cross-section, 130x130 mm, with a square profile. Each sleeve provides an insertion length of 90 mm. The transition section between the two sides is 20 mm long, for an overall length of 200 mm (side A sleeve, transition and side B sleeve). Inner and outer edges at both ends are left unchamfered.
Parameter Value Unit
side A internal width 130 mm
side A internal height 130 mm
sleeve length on side A 90 mm
side B internal width 130 mm
side B internal height 130 mm
sleeve length on side B 90 mm
thickness 3 mm
transition length 20 mm
Y offset 0 mm
Z offset 0 mm
end chamfers none

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

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 3D file 220x90 mm to 205x60 mm – transition: 50 mm (📦 #9685)

1 object(s) - format STL
Rectangular tube adapter STL 3D file 220x90 mm to 205x60 mm – transition: 50 mm
Rectangular duct transition exported as STL 3D file. The internal cross-section on side A is 220x90 mm (rectangular), while side B is 205x60 mm (rectangular). Each sleeve provides an insertion length of 40 mm. The transition section between the two sides is 50 mm long, for an overall length of 130 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 220 mm
side A internal height 90 mm
sleeve length on side A 40 mm
side B internal width 205 mm
side B internal height 60 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 50 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

Rectangle-to-rectangle duct adapter STL file 220x90 mm to 205x60 mm – transition: 50 mm (📦 #9709)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL file 220x90 mm to 205x60 mm – transition: 50 mm
Rectangular duct connector provided as 3D STL file. Side A uses an internal cross-section of 220x90 mm (rectangular), whereas side B is 205x60 mm (rectangular). Both side A and side B sleeves share the same insertion length of 40 mm. Between the two sleeves, the transition section adds 50 mm, giving an overall length of 130 mm. Internal chamfers at the ends improve assembly and provide a smoother insertion of the mating duct. Side B is offset by 15 mm along the Z 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 40 mm
side B internal width 205 mm
side B internal height 60 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 50 mm
Y offset 0 mm
Z offset 15 mm
end chamfers inside

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

1 object(s) - format STL
Rectangular tube adapter STL file 100x100 mm to 35x35 mm – transition: 30 mm
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.
Parameter Value Unit
side A internal width 100 mm
side A internal height 100 mm
sleeve length on side A 30 mm
side B internal width 35 mm
side B internal height 35 mm
sleeve length on side B 50 mm
thickness 2 mm
transition length 30 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 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 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 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 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 214x84 mm to 198x54 mm – transition: 40 mm (📦 #9718)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 214x84 mm to 198x54 mm – transition: 40 mm
Rectangular adapter provided as 3D STL file. Side A uses an internal cross-section of 214x84 mm (rectangular), whereas side B is 198x54 mm (rectangular). On side A, the sleeve length is 30 mm, and on side B it is 40 mm. Between the two sleeves, the transition section adds 40 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. An offset of 16 mm along the Z axis is applied to side B with respect to side A.
Parameter Value Unit
side A internal width 214 mm
side A internal height 84 mm
sleeve length on side A 30 mm
side B internal width 198 mm
side B internal height 54 mm
sleeve length on side B 40 mm
thickness 3 mm
transition length 40 mm
Y offset 0 mm
Z offset 16 mm
end chamfers outside

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 3D file 182.4x92.8 mm to 182.4x32 mm – transition: 100 mm (📦 #4551)

1 object(s) - format STL
Rectangle-to-rectangle duct adapter STL 3D file 182.4x92.8 mm to 182.4x32 mm – transition: 100 mm
Rectangular duct connector downloadable as STL 3D file. Side A uses an internal cross-section of 182.4x92.8 mm (rectangular), whereas side B is 182.4x32 mm (rectangular). The sleeve on side A provides an insertion length of 60 mm, and the sleeve on side B 50 mm. The transition section runs for 100 mm and the overall length is 210 mm, sleeves included. Wall thickness is generous (4 mm). Inner and outer edges at both ends are left unchamfered. Side B is offset by 30.4 mm along the Z axis relative to side A.
Parameter Value Unit
side A internal width 182.4 mm
side A internal height 92.8 mm
sleeve length on side A 60 mm
side B internal width 182.4 mm
side B internal height 32 mm
sleeve length on side B 50 mm
thickness 4 mm
transition length 100 mm
Y offset 0 mm
Z offset 30.4 mm
end chamfers none

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

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 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

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