Traxxas fuel tank rebuild kit (contains cap, foam washer, o-ring, upper/lower Retainers, screw, spring and screw pin). 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.