Thingiverse
Flanged Roller for Mini Kossel ( for use with 9mmx4mm bearing rollers with m3 inner diameter hole) by WingedPower
by Thingiverse
Last crawled date: 4 years, 3 months ago
I ended up getting 9mm OD, 3mm ID, 4mm thick ball bearings. This flanged is designed to fit a bearing on each side and fill up the 9-10mm space at the top of the mini kossel.