Custom Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 35×20 mm, thickness 2 mm 📦#7945

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Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀75 mm and a rectangular section with internal dimensions 35×20 mm. The wall thickness is 2 mm and the total length is 120 mm.
Generation date: 2026-03-22
3D Model Round-to-Rectangular Tube Adapter STL file ⌀75 mm to 35×20 mm, thickness 2 mm

3D model download

Free
  • round-to-rectangular-adapter-d_model7945-nb0_dd{id}.stl : 1.8 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 Round to rectangular adapter template, with the following values:
Parameter Value
#1 cylinder outer diameter 75 mm (≃2 15/16 in)
#2 cylinder inlet length 40 mm (≃1 9/16 in)
#3 rectangle internal length 35 mm (≃1 3/8 in)
#4 rectangle internal height 20 mm (≃0.79 in)
#5 rectangle inlet length 40 mm (≃1 9/16 in)
#6 offset Z 0 mm (0 in)
#7 offset Y 0 mm (0 in)
#8 total length 120 mm (≃4.72 in)
#9 thickness 2 mm (≃0.08 in)
#10 chamfer no chamfer
Metadata Value
Cylinder internal diameter 71 mm (≃2.80 in)
illustration of the parameters
Parameter overview

  • If the chamfer option on the ends is enabled, the chamfer length is equal to half the thickness.
  • The stop at the bottom of the rectangular section has a width equal to half the thickness.

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

Parameter Label
#1 cylinder outer diameter diaC
#2 cylinder inlet length lentC
#3 rectangle internal length lenIR
#4 rectangle internal height heiIR
#5 rectangle inlet length lentR
#6 offset Z ofsZ
#7 offset Y ofsY
#8 total length lenT
#9 thickness thi
#10 chamfer cha

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

Round-to-Rectangular Tube Adapter STL file ⌀109 mm to 55×12 mm, thickness 2 mm (📦 #8796)

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Round-to-Rectangular Tube Adapter STL file ⌀109 mm to 55×12 mm, thickness 2 mm
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀109 mm and a rectangular section with inner dimensions 55×12 mm. The wall thickness is 2 mm and the total length is 120 mm.
Parameter Value Unit
cylinder outer diameter 109 mm
cylinder inlet length 40 mm
rectangle internal length 55 mm
rectangle internal height 12 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 55×30 mm, thickness 2 mm (📦 #7940)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 55×30 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀75 mm and a rectangular section with internal dimensions 55×30 mm. The shell thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 40 mm
rectangle internal length 55 mm
rectangle internal height 30 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀55 mm to 29×19 mm, thickness 2 mm (📦 #2937)

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Round-to-Rectangular Tube Adapter STL file ⌀55 mm to 29×19 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀55 mm and a rectangular section with inner dimensions 29×19 mm. The shell thickness is 2 mm and the total length is 80 mm.
Parameter Value Unit
cylinder outer diameter 55 mm
cylinder inlet length 29 mm
rectangle internal length 29 mm
rectangle internal height 19 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀85 mm to 105×50 mm, thickness 2 mm (📦 #1654)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀85 mm to 105×50 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀85 mm and a rectangular section with internal dimensions 105×50 mm. The shell thickness is 2 mm and the overall length is 150 mm.
Parameter Value Unit
cylinder outer diameter 85 mm
cylinder inlet length 50 mm
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Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm (📦 #1772)

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Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀80 mm and a rectangular section with inner dimensions 105×50 mm. The wall thickness is 2 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 50 mm
rectangle internal length 105 mm
rectangle internal height 50 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 35×5 mm, thickness 2 mm (📦 #8445)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 35×5 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀32 mm and a rectangular section with inner dimensions 35×5 mm. The shell thickness is 2 mm and the total length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
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offset Y 0 mm
total length 120 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀76 mm to 117×52 mm, thickness 2 mm (📦 #7532)

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Parameter Value Unit
cylinder outer diameter 76 mm
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rectangle internal length 117 mm
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Round-to-Rectangular Tube Adapter STL file ⌀49.5 mm to 54×25 mm, thickness 2 mm + offset (📦 #8076)

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Parameter Value Unit
cylinder outer diameter 49.5 mm
cylinder inlet length 30 mm
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Round-to-Rectangular Tube Adapter STL file ⌀48 mm to 54×25 mm, thickness 2 mm + offset (📦 #8073)

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Parameter Value Unit
cylinder outer diameter 48 mm
cylinder inlet length 30 mm
rectangle internal length 54 mm
rectangle internal height 25 mm
rectangle inlet length 50 mm
offset Z 10 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀43 mm to 25×6 mm, thickness 2 mm (📦 #1750)

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Parameter Value Unit
cylinder outer diameter 43 mm
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cylinder outer diameter 32 mm
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Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 25 mm
rectangle internal length 32 mm
rectangle internal height 32 mm
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offset Y 0 mm
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thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm (📦 #3004)

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Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀20 mm and a rectangular section with inner dimensions 26×26 mm. The shell thickness is 2 mm and the total length is 90 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 30 mm
rectangle internal length 26 mm
rectangle internal height 26 mm
rectangle inlet length 40 mm
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total length 90 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀49.1 mm to 53×43 mm, thickness 2 mm + offset (📦 #8078)

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Round-to-Rectangular Tube Adapter STL file ⌀49.1 mm to 53×43 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀49.1 mm and a rectangular section with internal dimensions 53×43 mm. The shell thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 10 mm along the Z axis. A chamfer is applied on the outside of the cylindrical end to ease insertion.
Parameter Value Unit
cylinder outer diameter 49.1 mm
cylinder inlet length 30 mm
rectangle internal length 53 mm
rectangle internal height 43 mm
rectangle inlet length 50 mm
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offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 50×63 mm, thickness 2 mm (📦 #2228)

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Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 50×63 mm, thickness 2 mm
3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀65 mm and a rectangular section with inner dimensions 50×63 mm. The shell thickness is 2 mm and the overall length is 80 mm. A chamfer is applied on the outside of the cylindrical end.
Parameter Value Unit
cylinder outer diameter 65 mm
cylinder inlet length 30 mm
rectangle internal length 50 mm
rectangle internal height 63 mm
rectangle inlet length 30 mm
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offset Y 0 mm
total length 80 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 106×49 mm, thickness 2 mm (📦 #5029)

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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 106×49 mm, thickness 2 mm
Download this model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀100 mm and a rectangular section with inner dimensions 106×49 mm. The wall thickness is 2 mm and the total length is 90 mm.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 30 mm
rectangle internal length 106 mm
rectangle internal height 49 mm
rectangle inlet length 30 mm
offset Z 0 mm
offset Y 0 mm
total length 90 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 30×30 mm, thickness 2 mm + offset (📦 #2024)

1 object(s) - format STL (5.0/5) 1 vote(s)
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 30×30 mm, thickness 2 mm + offset
3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀100 mm and a rectangular section with inner dimensions 30×30 mm. The shell thickness is 2 mm and the total length is 100 mm. The adapter has an offset of 2 mm along the Y axis and 2 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 20 mm
rectangle internal length 30 mm
rectangle internal height 30 mm
rectangle inlet length 20 mm
offset Z 2 mm
offset Y 2 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 60×30 mm, thickness 3 mm (📦 #1474)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 60×30 mm, thickness 3 mm
Download this file in STL format of a round-to-rectangular adapter with an external diameter of ⌀80 mm and a rectangular section with internal dimensions 60×30 mm. The wall thickness is 3 mm and the overall length is 90 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 30 mm
rectangle internal length 60 mm
rectangle internal height 30 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 90 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 80×5 mm, thickness 2 mm (📦 #8448)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀32 mm to 80×5 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀32 mm and a rectangular section with inner dimensions 80×5 mm. The wall thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
rectangle internal length 80 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀109 mm to 55×12 mm, thickness 3 mm (📦 #8797)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀109 mm to 55×12 mm, thickness 3 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀109 mm and a rectangular section with internal dimensions 55×12 mm. The shell thickness is 3 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 109 mm
cylinder inlet length 40 mm
rectangle internal length 55 mm
rectangle internal height 12 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 3 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 50×50 mm, thickness 2 mm (📦 #1891)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀50 mm to 50×50 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀50 mm and a rectangular section with internal dimensions 50×50 mm. The shell thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 50 mm
cylinder inlet length 25 mm
rectangle internal length 50 mm
rectangle internal height 50 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 50×50 mm, thickness 2 mm (📦 #1497)

1 object(s) - format STL (5.0/5) 4 vote(s)
Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 50×50 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀100 mm and a rectangular section with internal dimensions 50×50 mm. The wall thickness is 2 mm and the overall length is 100 mm.
Parameter Value Unit
cylinder outer diameter 100 mm
cylinder inlet length 25 mm
rectangle internal length 50 mm
rectangle internal height 50 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 100 mm
thickness 2 mm
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Round-to-Rectangular Tube Adapter STL 3D file ⌀33 mm to 75×12 mm, thickness 2 mm (📦 #9002)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀33 mm to 75×12 mm, thickness 2 mm
3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀33 mm and a rectangular section with internal dimensions 75×12 mm. The wall thickness is 2 mm and the overall length is 85 mm.
Parameter Value Unit
cylinder outer diameter 33 mm
cylinder inlet length 31 mm
rectangle internal length 75 mm
rectangle internal height 12 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 85 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 100.5×73.5 mm, thickness 2 mm (📦 #9080)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 100.5×73.5 mm, thickness 2 mm
3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀80 mm and a rectangular section with internal dimensions 100.5×73.5 mm. The wall thickness is 2 mm and the overall length is 150 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 50 mm
rectangle internal length 100.5 mm
rectangle internal height 73.5 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 37×16 mm, thickness 2 mm (📦 #8237)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 37×16 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀20 mm and a rectangular section with inner dimensions 37×16 mm. The shell thickness is 2 mm and the total length is 110 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 30 mm
rectangle internal length 37 mm
rectangle internal height 16 mm
rectangle inlet length 60 mm
offset Z 0 mm
offset Y 0 mm
total length 110 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 90×5 mm, thickness 2 mm (📦 #8449)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀32 mm to 90×5 mm, thickness 2 mm
Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀32 mm and a rectangular section with inner dimensions 90×5 mm. The wall thickness is 2 mm and the overall length is 120 mm.
Parameter Value Unit
cylinder outer diameter 32 mm
cylinder inlet length 30 mm
rectangle internal length 90 mm
rectangle internal height 5 mm
rectangle inlet length 20 mm
offset Z 0 mm
offset Y 0 mm
total length 120 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀36 mm to 75×31 mm, thickness 2 mm (📦 #7742)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀36 mm to 75×31 mm, thickness 2 mm
Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀36 mm and a rectangular section with internal dimensions 75×31 mm. The wall thickness is 2 mm and the total length is 80 mm.
Parameter Value Unit
cylinder outer diameter 36 mm
cylinder inlet length 35 mm
rectangle internal length 75 mm
rectangle internal height 31 mm
rectangle inlet length 15 mm
offset Z 0 mm
offset Y 0 mm
total length 80 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀85 mm to 105×50 mm, thickness 2 mm + offset (📦 #1656)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀85 mm to 105×50 mm, thickness 2 mm + offset
Download this model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀85 mm and a rectangular section with internal dimensions 105×50 mm. The shell thickness is 2 mm and the overall length is 150 mm. The adapter has an offset of 15 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 85 mm
cylinder inlet length 50 mm
rectangle internal length 105 mm
rectangle internal height 50 mm
rectangle inlet length 46 mm
offset Z 15 mm
offset Y 0 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 56×71 mm, thickness 2 mm (📦 #8723)

1 object(s) - format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 56×71 mm, thickness 2 mm
3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀65 mm and a rectangular section with internal dimensions 56×71 mm. The wall thickness is 2 mm and the total length is 75 mm.
Parameter Value Unit
cylinder outer diameter 65 mm
cylinder inlet length 20 mm
rectangle internal length 56 mm
rectangle internal height 71 mm
rectangle inlet length 35 mm
offset Z 0 mm
offset Y 0 mm
total length 75 mm
thickness 2 mm
chamfer no chamfer