Rudder (127.5 mm)/ rudder arm/ hinge pin/ 3x15mm BCS (staiNLess) (2)/ NL 3.0 (2)/ 4x3mm BCS (staiNLess, with thread lock) (1) 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.