This is the Replacement 32 Tooth Pulley for the Traxxas Electric 4-Tec. This is the main diff pulley and can be used on the front or rear. FEATURES: Nylon Construction 32 Teeth Black in Color INCLUDES: One Black 32T Pulley REQUIRES: Nothing SPECS: Diameter: 233mm Width: 6mm JiM 11.01.01 ir/kh