Product features:
Fit for 3D Printer Filament Spool Roller, Supplies.
Easy to adjust for different length randomly
3D Printer Filament Tabletop Mount Rack Frame Tray Holder Bracket.
636zz bearing size:
ID: 6mm OD: 22mm H: 6mm
Package listing:
1set filament spool holder (2 pcs separated holders)