This is the 17/18/19 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
Ideal for large 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 17, 18 and 19 tooth pinion gears, three 3x3mm set screws
REQUIRES: Instaling on motor shaft
SPECS: Pitch: Mod 0.6
Inside Diameter: 1/8"