This is the Replacement 41 Tooth 1st Speed Spur Gear for the Nitro 4-TEC. This spur gear is installed in the transmission and meshes with the 2-speed drive gear. FEATURES: Replaces damaged or worn spur gears Black plastic construction YOU WILL RECEIVE: One 41 Tooth 1st Speed Spur Gear REQUIREMENTS: Installing in gearbox between the drive hub assembly and the primary gears COMMENTS: Manufacturer"s website is www.traxxas.com jm 10/30/02 ir/jl &