This is the 14/15/16 Tooth Pinion Gear Set from Novak. FEATURES: Designed to fit the non-standard 1/8" diameter motor shaft used on Novak Three-80 Micro Pro Brushless Motors included in the Mongoose Brushless Systems Ideal for medium size tracks Can be used with any vehicle that uses a Mod 0.6 spur gear such as the Duratrax Vendetta series High strength machined aluminum construction INCLUDES: One each 14, 15 and 16 tooth pinion gears, three 3x3mm set screws REQUIRES: Instaling on motor shaft SPECS: Pitch: Mod 0.6 Inside Diameter: 1/8" jxs 6/25/08 ir/jxs