I will add other bushings for other brands as I get them. Currently, you can find bushing for:

32mm

• 3D Printer Supplies (Amazon) (1kg)
• OnlineFilament (Amazon) (1kg)

39mm

• UltiMachine (5lb)
• 3D Ink (3lb)

51mm

• UltiMachine (1kg)
• ProtoParadigm (1kg)

All bushings are meant to fit the standard smooth rod used on a Prusa (8mm).

Please let me know if you need another size or if an existing size fits an unlisted spool!

Print two of the proper bushing, snap them onto your spool, slide an 8mm smooth rod through and attach to your spool-holding mechanism.