Brass Worm Gear Set – 0.5 Modulus 20T 20:1 Gear-5mm bore, Rod-3mm bore
Right Rotation Brass Worm Gear Set – Modulus 0.5, 20:1 Reduction Rate, Rod in 3mm Hole,Gear can be in 4mm or 5mm hole. Totally Include – 1pcs brass gear wheel and 1 brass gear rod. Versatile Application – Suitable for small motor deceleration and changing transmission direction.