This is a very affordable 3D printed post holder for mounting 10mm diameter optical posts.
To fix the post height simply tighten the M6 set screw in one of the four M6 threaded holes on the side.
Inner diameter: 10mm
The pots holder can be mounted on a optical table. Using the M6 screw inside.
All DIY-Optics.com optomechanics are highly compatible with other industry standard optomechanics. (Thorlabs, Edmund Optics, Optosigma ..etc.)
See drawing for further dimensions.