This is the 81 Tooth Spur Gear made by Kimbrough for use on the Associated RC10B4 buggy. FEATURES: Plastic construction Black in color YOU WILL RECEIVE: One 81 tooth spur gear REQUIREMENTS: Attaching to the RC10B4 buggy SPECIFICATIONS: Outer Diameter: 44mm (1.73") Inner Diameter: 4.8mm (.189") Teeth count: 81 teeth COMMENTS: For use with the RC10B4 high torque capacity, double sided slipper. NNA 4/15/03 ir/jxs &