HONG YI-HAT GT2 Idler Pulley Without Tooth Timing Belt Pulley Wheel 3/5MM Bore Width 6MM 3D Printer Parts for prusa I3 MK3 MK3S Drone Spare Parts Size Bore 5mm
- Bore 3mm: For Prusa I3/MK2.5/SMK3/MK3S, etc.
- Bore 5mm: For Wanhao I3 and other FDM printers.