1pcs Helical Gear 1 Mod 40T 45Teeth 45 Degree Left Right Rotation Gear Bore 8 10 12 14 15 16 ~20mm 45# Steel Hardening BlackenedHome Improvement > Hardware8,87 $ (≈ 7,30 CHF)10,44 $Auf LagerSold by AliExpress WWZum Shop