Special made release bearing in (almost) any height / length
The bearing surface of the bearing against the coupling springs is outer diameter Ø66mm / inner diameter Ø42,8mm.
Can be ordered in almost any length.
The body is made of high quality aluminum.
The dimensions required for the manufacture of bearings can be seen on the image.
Usually this is Ø32mm inside to fit onto eg M40 / M45.
For example, the B30 is inner diameter Ø35mm.
Can be done in other measurements.