Universal Mod-1 pinion gear, fit 5mm RC motor shaft, includes a 5mm to 3.175mm shaft coupler, for RC car truck and more.
You will receive 4pcs (15T 16T 17T 18T) pinion gear, 4pcs grub screws, a 3.175mm (1/8") shaft coupler, and a hex key.
Made of carbon steel, the pinion gear has better hardness, higher strength, and resistance to deformation.
Frequency-hardened parts have higher wear resistance, higher strength, and lower notch sensitivity, durable and reusable.
Good pinion gear replacement for your device.
Notice: Please note that the pinion has a soft tooth surface and cannot withstand too much force.