Features: Made of high quality material for maximum durability, long service life. Professional manufacturing, low noise, stable performance and high reliability. Large moment of force, low power consumption, energy saving. With ball bearing and cooling fan, superior performance. Easy to install, a good replacement for the old or broken one. Specification:Condition: 100% brand newWeight: 350g / 12.3ozMotor step height: 4.5mmMotor step diameter: 17.5mmShaft length: 16mm (shaft length above step level)Shaft diameter: 5mm round shaftMotor diameter: 42mmMotor length: 67mmMotor tail step height: about 11mmMotor tail shaft length: about 5mmSpacing of mounting holes: about 29mmAperture of mounting hole: M4 screwRated voltage: 24VRated voltage: between 12V and 30VStarting current: 4- (1A and 2A are immovable), operating current is 300mA at 12V and 400mA at 24VRotation speed: 12V4000 RPM, 24V8000 RPMPackage List:1 x 775 Motor1 x Chuck1 x Wrench2 x Shaft Sleeve2 x Screw