1pcs Spur Gear 3 Mod 17/18/19/20 Teeth Flat Motor Gears 45# Steel Cylindrical Gear Bore 10 12 12.7 14 15 16-30mm Pitch 9.42mmHome Improvement > Hardware15,49 USD (≈ 13,87 €)20,38 USDDisponibileSold by AliExpress WWVai al negozio