Traxxas 4981 Differential Carrier with 13-T Pinion and 37-T Ring Gears Differential ring and pinion gear Includes diff carrier/6x10x0.5mm PTFE-coated washer (1)/ 2x8mm countersunk machine screws (4) Replaces worn or damaged parts Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles, consult your user's manual for exact parts listings