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Jack Hydrazine
08-13-2021, 07:57 PM
This 3D object is a transition from Este BT-20 tubing to BT-55 tubing. The distance between the two sizes of tubes (transition taper length) is 1.5 inch (38.1mm).

There are four models:

Solid,
Solid with a 3.2mm hole to allow for screw eyes to be fastened to it,
Hollow,
Hollow with end caps.

https://www.thingiverse.com/thing:4931950