1pc 20 25 30 35 40 50 60 Teeth 0.5M Brass Worm Gear 0.5 Module Copper Turbine Speed Ratio 1:20/25/30/35/40/50/60 Bore 4/5/6mmHome Improvement > Hardware3,39 USD (≈ 3,03 €)4,09 USDDisponibileSold by AliExpress WWVai al negozio