MK8 Drive Gear 1.75mm & 3mm Filament 3D Printer Extruder Pulley 5mm Shaft Reprap

MK8 Drive Gear 5mm Shaft - 35% More Powerful ! Fits 5mm Shafts with Allen / Hex grub screw. Shaft/Bore = 5mm. Material = Stainless Steel.

eBay