Model Number: RS550Voltage: 21VNo load Speed: 29800RPMTorque: 1N.mOutput Power: 60WType: Mini MotorUsage: Home ApplianceCommutation: BrushMotor Length: 75.1mmMotor Diameter: 37.2mmMotor Shaft Length: 12mmMotor Shaft Diameter: 3.2mmMotor Gear Diameter: 8.2mmMotor Gear Thickness: 6.8mmMotor Installation Hole Distance: 25mmProduct Weight: 220 G / 7.76 OuncesProduct Dimensions(L*W*H): 75x40x40 MM / 2.95x1.57x1.57 InchesColour:silverMaterial:MetalPackage Contents:1 x DC Motor1 x 8.2MM gearOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.