Traxxas 2961 Series 5 NiMH 7C 8.4V 5000mAh Hump 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 such as the Traxxas Stampede, consult your user's manual for exact parts listings