High-strength split one-piece machined 2-gear 14/18T pinion gear module from tough 7075 T6 aluminum and especially difficult coated for superior energy, light-weight, and high durability. Developed on a special gear machine, all pinions function ultra-precise tooth shaping and ultra-true running for vibration-free operation. Fine internal threading enables easy installation. Each pinion is okay etched using the enamel number for fast & simple recognition.