Specifications:Type(Optional): 6V 18000Rpm, 12V 12000Rpm, 12V 16000Rpm, 12V 20000Rpm, Total Length: Approx. 16.5Cm / 6.5InchHole Diameter: 1Cm / 0.39InQuantity: 1Weight: Approx. 270-289GPackage Included:1 X Electric Motor GearboxFeaturesHigh Quality - The Middle Gear Is Made Of Metal Which Is More S..