High-performance 13 tooth pinion gear, manufactured from special steel for toughness and durability, with precise tolerances to assure unparalleled concentricity. Created on a special gear machine, all pinions feature ultra-precise tooth shaping and ultra-true running for vibration-free operation. Each pinion is marked with the tooth number for easy and quick identification. - Special hardened steel - CNC cut teeth for perfect teeth shape and concentricity - for 5.0mm motor shafts - Made in Europe