CNBTR 5mm Bore Hole Diameter Brass Gear Shaft with 20 T Wheel 0.5 Modulus Set Drive Gear Box Shaft
CNBTR 0.5 Modulus Brass Gear Set with 5mm Hole 40 T Turbine Reducer 6mm Hole Screw Reducer: Amazon.com: Industrial & Scientific
CNBTR 12mm Silver GA12-N20 15RPM Miniature Metal Electric 3V DC Gear Motor Gearwheel with 10mm Output Shaft Set of 5
Amazon.com: CNBTR Silver Metal AC110V Single Flat Shaft Turnable Synchronous Motor 2-2.5RPM 10KGF.CM Torque Heater Fan Air Conditioner DIY Accessory : Home & Kitchen