Wall Mounted Spool Roller

High efficient wall mounted spool roller (updated version with better spool fit). For best performance, use additional teflon tube (attach it directly to the printer and insert into one of the outer wholes on the wall mount filament guide).6805-2RS bearing is required (like this one: https://www.amazon.com/dp/B082PYT33D?th=10)Use lower layer height and lower print speeds for threads to work well.