Description: Good wear resistance and strength, High accuracy, hard to rust Has good performances,High torque and low noise 550 dc motor high-speed / model motor,with cooling fan,it can work for a long time Suit for RC Car Truck Boat Model,such as Traxxas?HPI, HSP, Axial, Hongnor, Hobao, ZD ,FS. Specification: Rated voltage: DC12V current : 1.5 A Speed:18000 RPM/minute Output shaft diameter: 3.17mm (Round shaft) Output shaft length: 9mm Motor diameter: 37mm Motor length: 57mm Step height: 4.2mm Screw hole diameter: M3 Screw hole distance: 25mm Color: Gray Material:Aluminum alloy Package Includes: 1 piece DC12V 550 Motor