Filament Spool Holders with 3/8" bearing (6200 2RS)

These are custom spool holders that I designed to regularize how I mount my filament rolls. I got fed up with every roll of filament coming with a different type of spool so I setup a 3/8" threaded rod and created custom mounts using cheap bearings (6200 2RS) found at a local supplier. So far I have created holders for spools having an ID of 32mm, 38mm, and 59mm.