roller for ulightme filament spool holder

This is an addition for the ulightme Filament Spool Roller Arm for the Anet A8. It accepts standard 22mm skateboard bearings and rides on an 8mm shaft. The low profile spool holder found in ulightme's designs doesn't include these, so I made them. It takes for of these per spool. Can also be used as a pulley. Just finished assembly, I really like the low profile and adjust-ability of this, it can fit any roll, and even 2 rolls at a time.