40T Brass Filament Drive Gear Pulley for RepRap 3D Printer Extruder with 5mm Bore; for NEMA 17 Stepper Motor.

These filament gears are equipped with 2 x set screws to grip shaft firmly. Bore diameter is 5mm, compatible with NEMA 17 stepper motors. Gear Specs: Filament driving diameter (outer diameter):...