3Pcs Mini 12V DC 70 RPM High Torque Gear Box Motor Speed Controller Introduction: High quality 37mm， 12V， 70RPM reversible replacement and give your electrical and testing equipment a new lease of life Benefiting from high torque and low noise， this motor is solidly constructed and ready to install in numerous applications Specification: Rated voltage: 12V DC Voltage range: 3V-18V Voltage 3V， there is still considerable torque， can not handle with hand No-load speed: 70 rev \/ min No-load current: !#!amp!*!lt;=0.1 A Resist twisting: 7 kg \/ cm Reduction ratio: 1:90 Stall torque: 7 kg\/cm Stall current: 1.2 A At maximum efficiency: Speed: 52!#!amp!*!plusmn;10% rpm Current: !#!amp!*!lt;=0.3 A Torque: 3.5 kg\/cm Power: 4W Dimension: Diameter: 37mm Length (excluding shaft): 52mm Shaft length: 21mm Total length: 73mm Shaft diameter: 6mm Package included: 3 x 12V DC gear motor