Custom Rectangle-to-rectangle duct adapter STL 3D file 200x200 mm to 56x56 mm – transition: 40 mm 📦#5821

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3D STL file for rectangular tube adapter. Side A uses an internal cross-section of 200x200 mm (square), whereas side B is 56x56 mm (square). On side A, the sleeve length is 50 mm, and on side B it is 25 mm. The transition section runs for 40 mm and the overall length is 115 mm, sleeves included. Wall thickness is generous (4 mm). The internal edges at the ends are chamfered to help guide the duct during insertion.
Generation date: 2026-01-03
3D Model Rectangle-to-rectangle duct adapter STL 3D file 200x200 mm to 56x56 mm – transition: 40 mm

3D model download

Free
  • rectangular-to-rectangular-duc_model5821-nb0_dd{id}.stl : 1.1 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 200 mm (≃7 7/8 in)
#2 side A internal height 200 mm (≃7 7/8 in)
#3 sleeve length on side A 50 mm (≃1.97 in)
#4 side B internal width 56 mm (≃2.20 in)
#5 side B internal height 56 mm (≃2.20 in)
#6 sleeve length on side B 25 mm (≃0.98 in)
#7 thickness 4 mm (≃0.16 in)
#8 transition length 40 mm (≃1 9/16 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 208 mm (≃8 3/16 in)
external height on side A 208 mm (≃8 3/16 in)
external width on side B 64 mm (≃2.52 in)
external height on side B 64 mm (≃2.52 in)
total length 115 mm (≃4.53 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

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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
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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
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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
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Rectangular duct adapter STL 3D file 200x90 mm to 80x80 mm – transition: 60 mm (📦 #3870)

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Rectangular duct adapter STL 3D file 200x90 mm to 80x80 mm – transition: 60 mm
Rectangular duct sleeve downloadable as STL 3D file. The internal cross-section on side A is 200x90 mm (rectangular), while side B is 80x80 mm (square). The insertion length on side A is 40 mm, while on side B it is 30 mm. Between the two sleeves, the transition section adds 60 mm, giving an overall length of 130 mm. Wall thickness is generous (4 mm). The ends are left without chamfers, with sharp inner and outer edges.
Parameter Value Unit
side A internal width 200 mm
side A internal height 90 mm
sleeve length on side A 40 mm
side B internal width 80 mm
side B internal height 80 mm
sleeve length on side B 30 mm
thickness 4 mm
transition length 60 mm
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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
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sleeve length on side B 30 mm
thickness 3 mm
transition length 20 mm
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1 object(s) - format STL
Rectangular duct adapter STL 3D file 228x98 mm to 158x63 mm – transition: 20 mm
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Parameter Value Unit
side A internal width 228 mm
side A internal height 98 mm
sleeve length on side A 20 mm
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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
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Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 40 mm
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Parameter Value Unit
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Parameter Value Unit
side A internal width 220 mm
side A internal height 90 mm
sleeve length on side A 40 mm
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side B internal height 60 mm
sleeve length on side B 40 mm
thickness 3 mm
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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.
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
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1 object(s) - format STL
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Rectangular duct transition downloadable as STL 3D file. The internal cross-section on side A is 295x291 mm (rectangular), while side B is 130x130 mm (square). The sleeve insertion length is the same on both sides, 30 mm. Between the two sleeves, the transition section adds 25 mm, giving an overall length of 85 mm. The shell is thick, with a wall thickness of 5 mm. The ends are left without chamfers, with sharp inner and outer edges.
Parameter Value Unit
side A internal width 295 mm
side A internal height 291 mm
sleeve length on side A 30 mm
side B internal width 130 mm
side B internal height 130 mm
sleeve length on side B 30 mm
thickness 5 mm
transition length 25 mm
Y offset 0 mm
Z offset 0 mm
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1 object(s) - format STL
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Parameter Value Unit
side A internal width 150 mm
side A internal height 150 mm
sleeve length on side A 35 mm
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side B internal height 150 mm
sleeve length on side B 35 mm
thickness 2 mm
transition length 20 mm
Y offset 0 mm
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1 object(s) - format STL
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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
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Z offset 0 mm
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1 object(s) - format STL
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Parameter Value Unit
side A internal width 20 mm
side A internal height 90 mm
sleeve length on side A 40 mm
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side B internal height 80 mm
sleeve length on side B 30 mm
thickness 4 mm
transition length 60 mm
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Z offset 0 mm
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1 object(s) - format STL
Rectangular pipe adapter STL file 182.4x92.8 mm to 182.4x32 mm – transition: 100 mm
Rectangular duct sleeve downloadable as STL 3D file. The internal cross-section on side A is 182.4x92.8 mm (rectangular), while 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 30 mm. The transition section between the two sides is 100 mm long, for an overall length of 190 mm (side A sleeve, transition and side B sleeve). The shell is thick, with a wall thickness of 4 mm. No chamfers are applied at the ends; both inner and outer edges remain sharp. Relative to side A, side B is shifted by 30.4 mm along the Z axis.
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 30 mm
thickness 4 mm
transition length 100 mm
Y offset 0 mm
Z offset 30.4 mm
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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
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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
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1 object(s) - format STL
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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
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