Custom Tubing adapter STL 3D file ⌀ 50–39 mm (Length: 55 mm) 📦#12656

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Inline tube coupler ⌀50 mm to ⌀39 mm in STL format. Total length of this adapter is 55 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 25 mm. The ends are rounded on the outside to facilitate the connection of the two tubes.
Generation date: 2026-10-17
3D Model Tubing adapter STL 3D file ⌀ 50–39 mm (Length: 55 mm)

3D model download

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  • inline-tube-adapter-lenA20mm-d_model12656-nb0_dd{id}.stl : 5.9 Mo
STL Mesh quality : Linear deflection 0.05 Angular deflection 0.05
No compliance warranty No compliance warranty
(attribution - commercial use allowed)
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Values for this model

This model was generated by the Inline tube adapter template, with the following values:
Parameter Value
#1 side A length 20 mm (≃0.79 in)
#2 side A outer diameter 50 mm (≃1.97 in)
#3 side A thickness 2 mm (≃0.08 in)
#4 side B length 25 mm (≃0.98 in)
#5 side B outer diameter 39 mm (≃1.54 in)
#6 side B thickness 2 mm (≃0.08 in)
#7 transition length 10 mm (≃0.39 in)
#8 axis offset 0 mm (0 in)
#9 ends fillet fillet on the outside
Metadata Value
inner diameter (side A) 46 mm (≃1 13/16 in)
inner diameter (side B) 35 mm (≃1 3/8 in)
total length 55 mm (≃2.17 in)
illustration of the parameters
Parameter overview

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

Parameter Label
#1 side A length lenA
#2 side A outer diameter diA
#3 side A thickness thA
#4 side B length lenB
#5 side B outer diameter diB
#6 side B thickness thB
#7 transition length tra
#8 axis offset ofs
#9 ends fillet fil

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To search for a model based on your own parameters, go to the template page Inline tube adapter 

Tube adapter STL 3D file ⌀ 60–42 mm (Length: 70 mm) (📦 #6025)

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Tube adapter STL 3D file ⌀ 60–42 mm (Length: 70 mm)
Straight tube connector ⌀60 mm to ⌀42 mm in STL 3D format. Length of this junction is 70 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends have a fillet on the outside to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 60 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 42 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 72–46 mm (Length: 70 mm) (📦 #7400)

1 object(s) - format STL
Tube adapter STL file ⌀ 72–46 mm (Length: 70 mm)
Inline tube coupler ⌀72 mm to ⌀46 mm in STL format. Total length of this fitting is 70 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends are rounded on the outside to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 72 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 46 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 57–50 mm (Length: 70 mm) (📦 #4752)

1 object(s) - format STL
Tubing adapter STL file ⌀ 57–50 mm (Length: 70 mm)
Tube reducer ⌀57 mm to ⌀50 mm in STL 3D format. Final length of this sleeve is 70 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 35 mm, the smaller one of 25 mm. The ends feature an external fillet to make tube connection easier.
Parameter Value Unit
side A length 35 mm
side A outer diameter 57 mm
side A thickness 2 mm
side B length 25 mm
side B outer diameter 50 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 42–32 mm (Length: 30 mm) (📦 #11823)

1 object(s) - format STL
Tube adapter STL file ⌀ 42–32 mm (Length: 30 mm)
Straight sleeve ⌀42 mm to ⌀32 mm in STL format. Length of this connector is 30 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 10 mm, the smaller one of 10 mm as well. The ends feature an external fillet to ease the connection.
Parameter Value Unit
side A length 10 mm
side A outer diameter 42 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 32 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 62–52 mm (Length: 33 mm) (📦 #8856)

1 object(s) - format STL
Tube adapter STL file ⌀ 62–52 mm (Length: 33 mm)
Straight tube fitting ⌀62 mm to ⌀52 mm in STL format. Length of this junction is 33 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 8 mm, the smaller one of 15 mm. The ends have a fillet on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 8 mm
side A outer diameter 62 mm
side A thickness 2 mm
side B length 15 mm
side B outer diameter 52 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 43–29 mm (Length: 30 mm) (📦 #11771)

1 object(s) - format STL
Tube adapter STL file ⌀ 43–29 mm (Length: 30 mm)
Tubing reducer ⌀43 mm to ⌀29 mm in STL format. Total length of this sleeve is 30 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 10 mm, the smaller one of 10 mm as well. The ends have a fillet on the outside.
Parameter Value Unit
side A length 10 mm
side A outer diameter 43 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 29 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 39–31 mm (Length: 80 mm) (📦 #2553)

1 object(s) - format STL
Tube adapter STL file ⌀ 39–31 mm (Length: 80 mm)
Tube connector ⌀39 mm to ⌀31 mm in STL format. Length of this adapter is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 40 mm. The ends feature an external fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 39 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 31 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 32–25 mm (Length: 80 mm) (📦 #9682)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 32–25 mm (Length: 80 mm)
Inline tube adapter ⌀32 mm to ⌀25 mm in STL format. Total length of this junction is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 25 mm, the smaller one of 35 mm. The ends are rounded on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 25 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 35 mm
side B outer diameter 25 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 27–22 mm (Length: 75 mm) (📦 #9903)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 27–22 mm (Length: 75 mm)
Straight tube adapter ⌀27 mm to ⌀22 mm in STL format. Total length of this sleeve is 75 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends feature an external fillet to ease the connection.
Parameter Value Unit
side A length 30 mm
side A outer diameter 27 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 22 mm
side B thickness 2 mm
transition length 15 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 32–29 mm (Length: 25 mm) (📦 #11764)

1 object(s) - format STL
Tubing adapter STL file ⌀ 32–29 mm (Length: 25 mm)
Straight tubing adapter ⌀32 mm to ⌀29 mm in STL format. Total length of this junction is 25 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 10 mm, the smaller one of 10 mm as well. The ends feature an external fillet to ease the connection.
Parameter Value Unit
side A length 10 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 29 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL file ⌀ 29–28 mm (Length: 25 mm) (📦 #11763)

1 object(s) - format STL
Tubing adapter STL file ⌀ 29–28 mm (Length: 25 mm)
Inline tube reducer ⌀29 mm to ⌀28 mm in STL format. Total length of this coupler is 25 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 10 mm, the smaller one of 10 mm as well. The ends feature an external fillet to ease the connection.
Parameter Value Unit
side A length 10 mm
side A outer diameter 29 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 28 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 70–69 mm (Length: 50 mm) (📦 #1394)

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Tube adapter STL 3D file ⌀ 70–69 mm (Length: 50 mm)
Diameter adapter ⌀70 mm to ⌀69 mm in STL 3D format. Length of this sleeve is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends have a fillet on the outside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 20 mm
side A outer diameter 70 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 69 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 31–20 mm (Length: 45 mm) (📦 #10819)

1 object(s) - format STL
Tube adapter STL file ⌀ 31–20 mm (Length: 45 mm)
Inline fitting ⌀31 mm to ⌀20 mm in STL format. Final length of this coupler is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 15 mm, the smaller one of 10 mm. The ends are rounded on the outside to ease the connection.
Parameter Value Unit
side A length 15 mm
side A outer diameter 31 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 20 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 44–42 mm (Length: 35 mm) (📦 #11712)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 44–42 mm (Length: 35 mm)
Inline fitting ⌀44 mm to ⌀42 mm in STL 3D format. Total length of this reducer is 35 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 15 mm, the smaller one of 15 mm as well. The ends feature an external fillet to make tube connection easier.
Parameter Value Unit
side A length 15 mm
side A outer diameter 44 mm
side A thickness 3 mm
side B length 15 mm
side B outer diameter 42 mm
side B thickness 3 mm
transition length 5 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 47–38 mm (Length: 50 mm) (📦 #6526)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 47–38 mm (Length: 50 mm)
Tube junction ⌀47 mm to ⌀38 mm in STL 3D format. Total length of this fitting is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 47 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 38 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 77–68 mm (Length: 55 mm) (📦 #11040)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 77–68 mm (Length: 55 mm)
Straight sleeve ⌀77 mm to ⌀68 mm in STL 3D format. Final length of this sleeve is 55 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends feature an external fillet to make tube connection easier.
Parameter Value Unit
side A length 20 mm
side A outer diameter 77 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 68 mm
side B thickness 2 mm
transition length 15 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 50–45 mm (Length: 60 mm) (📦 #4751)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 50–45 mm (Length: 60 mm)
Inline tube adapter ⌀50 mm to ⌀45 mm in STL format. Length of this reducer is 60 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 50 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 45 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 80–52 mm (Length: 28 mm) (📦 #8855)

1 object(s) - format STL
Tubing adapter STL file ⌀ 80–52 mm (Length: 28 mm)
Straight sleeve ⌀80 mm to ⌀52 mm in STL 3D format. Final length of this connector is 28 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 8 mm, the smaller one of 10 mm. The ends have a fillet on the outside.
Parameter Value Unit
side A length 8 mm
side A outer diameter 80 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 52 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 50–34 mm (Length: 45 mm) (📦 #11042)

1 object(s) - format STL
Tube adapter STL file ⌀ 50–34 mm (Length: 45 mm)
Tube coupler ⌀50 mm to ⌀34 mm in STL 3D format. Length of this fitting is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 50 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 55–44 mm (Length: 65 mm) (📦 #9290)

1 object(s) - format STL
Tubing adapter STL file ⌀ 55–44 mm (Length: 65 mm)
Inline tube reducer ⌀55 mm to ⌀44 mm in STL 3D format. Final length of this fitting is 65 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 25 mm, the smaller one of 25 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 25 mm
side A outer diameter 55 mm
side A thickness 2 mm
side B length 25 mm
side B outer diameter 44 mm
side B thickness 2 mm
transition length 15 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 25–20 mm (Length: 45 mm) (📦 #5534)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 25–20 mm (Length: 45 mm)
Inline tubing adapter ⌀25 mm to ⌀20 mm in STL 3D format. Length of this fitting is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 5 mm, the smaller one of 20 mm. The ends are rounded on the outside to ease the connection.
Parameter Value Unit
side A length 5 mm
side A outer diameter 25 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 20 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL file ⌀ 37–34 mm (Length: 50 mm) (📦 #6842)

1 object(s) - format STL
Tube adapter STL file ⌀ 37–34 mm (Length: 50 mm)
Straight tube connector ⌀37 mm to ⌀34 mm in STL 3D format. Total length of this sleeve is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 37 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 40–39 mm (Length: 45 mm) (📦 #8794)

1 object(s) - format STL
Tube adapter STL file ⌀ 40–39 mm (Length: 45 mm)
Inline tubing adapter ⌀40 mm to ⌀39 mm in STL 3D format. Total length of this reducer is 45 mm. The larger-diameter tube has a thickness of 2 mm and a sleeve length of 20 mm. The smaller-diameter tube has a thickness of 2.3 mm and a length of 20 mm as well. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 40 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 39 mm
side B thickness 2.3 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 63–36 mm (Length: 45 mm) (📦 #8773)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 63–36 mm (Length: 45 mm)
Diameter adapter ⌀63 mm to ⌀36 mm in STL format. Final length of this adapter is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 20 mm
side A outer diameter 63 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 36 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 39–34 mm (Length: 45 mm) (📦 #8787)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 39–34 mm (Length: 45 mm)
Inline fitting ⌀39 mm to ⌀34 mm in STL 3D format. Total length of this connector is 45 mm. The larger-diameter tube has a thickness of 2.2 mm and a length of 20 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 20 mm as well. The ends are raw.
Parameter Value Unit
side A length 20 mm
side A outer diameter 39 mm
side A thickness 2.2 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 50–49 mm (Length: 57 mm) (📦 #3608)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 50–49 mm (Length: 57 mm)
Tube junction ⌀50 mm to ⌀49 mm in STL 3D format. Final length of this adapter is 57 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 26 mm, the smaller one of 26 mm as well. The ends are raw.
Parameter Value Unit
side A length 26 mm
side A outer diameter 50 mm
side A thickness 2 mm
side B length 26 mm
side B outer diameter 49 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 55–50 mm (Length: 55 mm) (📦 #12508)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 55–50 mm (Length: 55 mm)
Inline tubing adapter ⌀55 mm to ⌀50 mm in STL format. Final length of this sleeve is 55 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 25 mm, the smaller one of 25 mm as well. The ends are raw.
Parameter Value Unit
side A length 25 mm
side A outer diameter 55 mm
side A thickness 2 mm
side B length 25 mm
side B outer diameter 50 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 72–65 mm (Length: 49 mm) (📦 #8717)

1 object(s) - format STL
Tube adapter STL file ⌀ 72–65 mm (Length: 49 mm)
Inline tubing adapter ⌀72 mm to ⌀65 mm in STL 3D format. Length of this coupler is 49 mm. The larger-diameter tube has a thickness of 3 mm and a length of 20 mm. The smaller-diameter tube has a thickness of 2 mm and a length of 20 mm as well. The ends have a fillet on the outside.
Parameter Value Unit
side A length 20 mm
side A outer diameter 72 mm
side A thickness 3 mm
side B length 20 mm
side B outer diameter 65 mm
side B thickness 2 mm
transition length 9 mm
axis offset 0 mm
ends fillet fillet on th...

Tube adapter STL 3D file ⌀ 35–34 mm (Length: 45 mm) (📦 #8211)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 35–34 mm (Length: 45 mm)
Inline fitting ⌀35 mm to ⌀34 mm in STL format. Final length of this junction is 45 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 20 mm
side A outer diameter 35 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 34 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet