Spur-geared metal gearbox, 100:1 Gear Ratio, 4.5 to 15V Voltage Rating, 7.98W Power Rating, 11,646rpm No Load Speed, 9869rpm Maximum Speed, 0.99A Load Current, 78.4g-cm Maximum Continuous Torque, 513.5g-cm Stall Torque, 35mm Diameter, 6mm Shaft Diameter, 90mm Long, 161g Weight, Powerful 5-pole Motor, The Gearboxes are of All-Metal Construction and Employ Spurred Gears High Torque Transfer, Output Bearings Enable the High Torque from the Motor to be Efficiently Transmitted Through the Gearbox, Suitable for Heavy-duty Industrial and Model Applications, MFA/COMO 950D Series.