Features: It is suitable for 1/10, 1/16, 1/18 RC car and boat. M2.5 screws for easy installation.(screws are not included) 4 poles, 12 slots, high-torque design. CNC machined 6061 T6 aluminum shell is of good heat dissipation. High purity copper windings maximized efficiency, which is resistant to high temperature. High-speed ABEC5 bearing is durable. Precise and balanced rotor is stable, with good stationarity, reliability and maximum speed. Stator - super thin (0.35mm) laminations. Rotor is removable and replaceable. Precision engineered for maximum energy conversion. Specification: Material: Metal + Magnet Color: Blue Weight: 204g Type: RC Parts & Accessories Item Name: 3650/3T Motor Watts: 900 Max Amps:107A Rotor Poles: 4 IO: 5.2A Resistance: 0.0043 KV (RPM/Volt) : 5900 Max RPM: 50000 Length: Approx. 50mm / 1.97inch Diameter: Approx. 36mm / 1.42inch Shaft Diameter: 3.175mm / 0.125inch Length of Extend Shaft: 15mm / 0.57inch Connector: 4mm Gold Connector Package List: 1 x Motor . Note : Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.