High-strength split one-piece machined 2-gear 14/19T pinion gear module from tough 7075 T6 aluminum and specially difficult coated for superior energy, light-weight, and high durability. Developed on a certain gear unit, all pinions work ultra-precise enamel shaping and ultra-true running for vibration-free procedure. Fine inside threading enables effortless installation. Each pinion is okay etched using the enamel volume for fast & effortless recognition.