Clutch bell, (22-tooth)/ 5x8x0.5mm fiber washer (2)/ 5mm E-clip (requires #4611-ball bearings, 5x11x4mm (2) Traxxas clutch bells are made from durable steel for long-lasting performance. They are available in a variety of sizes to fine tune your nitro vehicle's gear ratios. Larger clutch bells provide higher speeds, while smaller clutch bells provide more torque. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.