1pc 1M 45 Degree Helical Gear 12 13 14 15 16 18 20 Teeth 45# Steel Gear D Hole 5x4.5/6x5.5/8x7/8x7.5/10x9mm Left/Right SpiralHome Improvement > Hardware3,64 USD (≈ 3,26 €)4,39 USDDisponibileSold by AliExpress WWVai al negozio