Custom Tube adapter STL 3D file ⌀ 25–21 mm (Length: 148 mm) 📦#3662

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Tube junction ⌀25 mm to ⌀21 mm in STL format. Total length of this junction is 148 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 72 mm, the smaller one of 71 mm. The ends have no fillet.
Generation date: 2025-11-25
3D Model Tube adapter STL 3D file ⌀ 25–21 mm (Length: 148 mm)

3D model download

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  • inline-tube-adapter-lenA72mm-d_model3662-nb0_dd{id}.stl : 951.7 Ko
STL Mesh quality : Linear deflection 0.05 Angular deflection 0.05
No compliance warranty No compliance warranty
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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 72 mm (≃2.83 in)
#2 side A outer diameter 25 mm (≃0.98 in)
#3 side A thickness 2 mm (≃0.08 in)
#4 side B length 71 mm (≃2.80 in)
#5 side B outer diameter 21 mm (≃13/16 in)
#6 side B thickness 2 mm (≃0.08 in)
#7 transition length 5 mm (≃3/16 in)
#8 axis offset 0 mm (0 in)
#9 ends fillet no fillet
Metadata Value
inner diameter (side A) 21 mm (≃13/16 in)
inner diameter (side B) 17 mm (≃0.67 in)
total length 148 mm (≃5 13/16 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

Related 3D models

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

Tubing adapter STL file ⌀ 33–28 mm (Length: 170 mm) (📦 #7244)

1 object(s) - format STL
Tubing adapter STL file ⌀ 33–28 mm (Length: 170 mm)
Straight sleeve ⌀33 mm to ⌀28 mm in STL format. Length of this reducer is 170 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 80 mm, the smaller one of 80 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 80 mm
side A outer diameter 33 mm
side A thickness 2 mm
side B length 80 mm
side B outer diameter 28 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 33–24 mm (Length: 110 mm) (📦 #7249)

1 object(s) - format STL
Tube adapter STL file ⌀ 33–24 mm (Length: 110 mm)
Tube reducer ⌀33 mm to ⌀24 mm in STL 3D format. Length of this coupler is 110 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 50 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 50 mm
side A outer diameter 33 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 24 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 60–30 mm (Length: 140 mm) (📦 #4786)

1 object(s) - format STL
Tubing adapter STL file ⌀ 60–30 mm (Length: 140 mm)
Tube reducer ⌀60 mm to ⌀30 mm in STL 3D format. Total length of this coupler is 140 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a sleeve length of 60 mm, the smaller one of 60 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 60 mm
side A outer diameter 60 mm
side A thickness 2.5 mm
side B length 60 mm
side B outer diameter 30 mm
side B thickness 2.5 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 30–25 mm (Length: 120 mm) (📦 #10229)

1 object(s) - format STL
Tube adapter STL file ⌀ 30–25 mm (Length: 120 mm)
Tubing reducer ⌀30 mm to ⌀25 mm in STL 3D format. Length of this connector is 120 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 50 mm as well. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 30 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 25 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 44–40 mm (Length: 110 mm) (📦 #8091)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 44–40 mm (Length: 110 mm)
Tubing adapter ⌀44 mm to ⌀40 mm in STL format. Final length of this junction is 110 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 50 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 44 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 40 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 43–31 mm (Length: 120 mm) (📦 #2849)

1 object(s) - format STL
Tube adapter STL file ⌀ 43–31 mm (Length: 120 mm)
Tube adapter ⌀43 mm to ⌀31 mm in STL format. Final length of this coupler is 120 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 50 mm as well. The ends are not rounded.
Parameter Value Unit
side A length 50 mm
side A outer diameter 43 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 31 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 39–36 mm (Length: 100 mm) (📦 #7761)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 39–36 mm (Length: 100 mm)
Straight tubing adapter ⌀39 mm to ⌀36 mm in STL 3D format. Total length of this sleeve is 100 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 40 mm. The ends are not rounded.
Parameter Value Unit
side A length 50 mm
side A outer diameter 39 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 36 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 64–32 mm (Length: 166 mm) (📦 #2979)

1 object(s) - format STL
Tube adapter STL file ⌀ 64–32 mm (Length: 166 mm)
Inline tubing adapter ⌀64 mm to ⌀32 mm in STL 3D format. Total length of this junction is 166 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 80 mm, the smaller one of 60 mm. The ends are raw.
Parameter Value Unit
side A length 80 mm
side A outer diameter 64 mm
side A thickness 3 mm
side B length 60 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 26 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 56–50 mm (Length: 120 mm) (📦 #1493)

1 object(s) - format STL (5.0/5) 1 vote(s)
Tube adapter STL 3D file ⌀ 56–50 mm (Length: 120 mm)
Inline fitting ⌀56 mm to ⌀50 mm in STL format. Length of this adapter is 120 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 50 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 56 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 50 mm
side B thickness 2 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 63–43 mm (Length: 120 mm) (📦 #5796)

1 object(s) - format STL
Tubing adapter STL file ⌀ 63–43 mm (Length: 120 mm)
Inline tube junction ⌀63 mm to ⌀43 mm in STL 3D format. Length of this junction is 120 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 50 mm as well. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 63 mm
side A thickness 2.5 mm
side B length 50 mm
side B outer diameter 43 mm
side B thickness 2.5 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 51–48 mm (Length: 110 mm) (📦 #8084)

1 object(s) - format STL
Tubing adapter STL file ⌀ 51–48 mm (Length: 110 mm)
Inline tubing adapter ⌀51 mm to ⌀48 mm in STL format. Length of this reducer is 110 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 50 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 51 mm
side A thickness 3 mm
side B length 50 mm
side B outer diameter 48 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 32–25 mm (Length: 85 mm) (📦 #7957)

1 object(s) - format STL
Tubing adapter STL file ⌀ 32–25 mm (Length: 85 mm)
Straight tubing adapter ⌀32 mm to ⌀25 mm in STL 3D format. Final length of this coupler is 85 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 40 mm as well. The ends are raw.
Parameter Value Unit
side A length 40 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 25 mm
side B thickness 2 mm
transition length 5 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 80–46 mm (Length: 160 mm) (📦 #3941)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 80–46 mm (Length: 160 mm)
Inline sleeve ⌀80 mm to ⌀46 mm in STL 3D format. Length of this fitting is 160 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 80 mm, the smaller one of 60 mm. The ends have no fillet.
Parameter Value Unit
side A length 80 mm
side A outer diameter 80 mm
side A thickness 3 mm
side B length 60 mm
side B outer diameter 46 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 47–25 mm (Length: 90 mm) (📦 #10118)

1 object(s) - format STL
Tube adapter STL file ⌀ 47–25 mm (Length: 90 mm)
Tube fitting ⌀47 mm to ⌀25 mm in STL 3D format. Length of this adapter is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 40 mm, the smaller one of 40 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 40 mm
side A outer diameter 47 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 25 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 32–30 mm (Length: 110 mm) (📦 #9306)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 32–30 mm (Length: 110 mm)
Straight tube fitting ⌀32 mm to ⌀30 mm in STL format. Final length of this adapter is 110 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 50 mm as well. The ends feature an external fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 32 mm
side A thickness 3 mm
side B length 50 mm
side B outer diameter 30 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

Tubing adapter STL 3D file ⌀ 62–32 mm (Length: 124 mm) (📦 #6512)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 62–32 mm (Length: 124 mm)
Straight tube adapter ⌀62 mm to ⌀32 mm in STL 3D format. Total length of this junction is 124 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 64 mm, the smaller one of 40 mm. The ends have no fillet.
Parameter Value Unit
side A length 64 mm
side A outer diameter 62 mm
side A thickness 3 mm
side B length 40 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 36–32 mm (Length: 210 mm) (📦 #9203)

1 object(s) - format STL
Tube adapter STL file ⌀ 36–32 mm (Length: 210 mm)
Inline sleeve ⌀36 mm to ⌀32 mm in STL 3D format. Length of this adapter is 210 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 100 mm, the smaller one of 100 mm as well. The ends are raw.
Parameter Value Unit
side A length 100 mm
side A outer diameter 36 mm
side A thickness 3 mm
side B length 100 mm
side B outer diameter 32 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 32–26 mm (Length: 140 mm) (📦 #9751)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 32–26 mm (Length: 140 mm)
Inline tube reducer ⌀32 mm to ⌀26 mm in STL 3D format. Final length of this adapter is 140 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 50 mm as well. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 32 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 26 mm
side B thickness 2 mm
transition length 40 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL 3D file ⌀ 46–40 mm (Length: 91 mm) (📦 #8135)

1 object(s) - format STL
Tubing adapter STL 3D file ⌀ 46–40 mm (Length: 91 mm)
Inline tube coupler ⌀46 mm to ⌀40 mm in STL 3D format. Total length of this coupler is 91 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 46 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 40 mm
side B thickness 2 mm
transition length 11 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL file ⌀ 48–40 mm (Length: 90 mm) (📦 #8140)

1 object(s) - format STL
Tube adapter STL file ⌀ 48–40 mm (Length: 90 mm)
Tube coupler ⌀48 mm to ⌀40 mm in STL 3D format. Final length of this adapter is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 48 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 40 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tube adapter STL 3D file ⌀ 47–41 mm (Length: 90 mm) (📦 #8139)

1 object(s) - format STL
Tube adapter STL 3D file ⌀ 47–41 mm (Length: 90 mm)
Tubing reducer ⌀47 mm to ⌀41 mm in STL 3D format. Final length of this junction is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 30 mm. The ends have no fillet.
Parameter Value Unit
side A length 50 mm
side A outer diameter 47 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 41 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 48–41 mm (Length: 90 mm) (📦 #8137)

1 object(s) - format STL
Tubing adapter STL file ⌀ 48–41 mm (Length: 90 mm)
Inline fitting ⌀48 mm to ⌀41 mm in STL format. Final length of this adapter is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 48 mm
side A thickness 2 mm
side B length 30 mm
side B outer diameter 41 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 47–42 mm (Length: 90 mm) (📦 #8138)

1 object(s) - format STL
Tubing adapter STL file ⌀ 47–42 mm (Length: 90 mm)
Tube junction ⌀47 mm to ⌀42 mm in STL 3D format. Length of this coupler is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 30 mm. The ends are raw.
Parameter Value Unit
side A length 50 mm
side A outer diameter 47 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 no fillet

Tubing adapter STL file ⌀ 53–46 mm (Length: 100 mm) (📦 #8995)

1 object(s) - format STL
Tubing adapter STL file ⌀ 53–46 mm (Length: 100 mm)
Tube coupler ⌀53 mm to ⌀46 mm in STL 3D format. Length of this sleeve is 100 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 60 mm. The ends are raw.
Parameter Value Unit
side A length 30 mm
side A outer diameter 53 mm
side A thickness 2 mm
side B length 60 mm
side B outer diameter 46 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 36–12 mm (Length: 105 mm) (📦 #9491)

1 object(s) - format STL
Tubing adapter STL file ⌀ 36–12 mm (Length: 105 mm)
Tube adapter ⌀36 mm to ⌀12 mm in STL format. Length of this junction is 105 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends have no fillet.
Parameter Value Unit
side A length 40 mm
side A outer diameter 36 mm
side A thickness 2 mm
side B length 40 mm
side B outer diameter 12 mm
side B thickness 2 mm
transition length 25 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 64–42 mm (Length: 95 mm) (📦 #8094)

1 object(s) - format STL
Tubing adapter STL file ⌀ 64–42 mm (Length: 95 mm)
Straight tube connector ⌀64 mm to ⌀42 mm in STL 3D format. Total length of this junction is 95 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 35 mm, the smaller one of 50 mm. The ends are not rounded.
Parameter Value Unit
side A length 35 mm
side A outer diameter 64 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 42 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet

Tubing adapter STL file ⌀ 50–45 mm (Length: 95 mm) (📦 #8082)

1 object(s) - format STL
Tubing adapter STL file ⌀ 50–45 mm (Length: 95 mm)
Inline tube junction ⌀50 mm to ⌀45 mm in STL 3D format. Final length of this connector is 95 mm. The larger-diameter tube has a thickness of 2 mm and a sleeve length of 35 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 50 mm. The ends are not rounded.
Parameter Value Unit
side A length 35 mm
side A outer diameter 50 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 45 mm
side B thickness 3 mm
transition length 10 mm
axis offset 0 mm
ends fillet no fillet