1Suitable for 1/16, 1/18 model car, it has high torque and efficiency. 2Rotor is removable and replaceable. 3ABEC5 bearing has high RPM. 4High purity copper windings maximizes efficiency, which extends its service life greatly. 5CNC machined aluminum heatsink shell is of good heat dissipation. Features: Suitable for 1/16, 1/18 model car, it has high torque and efficiency. Rotor is removable and replaceable. ABEC5 bearing has high RPM. High purity copper windings maximizes efficiency, which extends its service life greatly. CNC machined aluminum heatsink shell is of good heat dissipation. Precision design achieves maximum energy conversion. Precise balanced rotor is stable, good smoothness for best reliability and maximum RPM. Specification: Material: Metal + Magnet Color: Blue Diameter: 24mm / 0.9inch Length: 45mm / 1.8inch Shaft Length: 12mm / 0.5inch Shaft Diameter: 2.3mm / 0.09inch Connetor: 3.5mm Bullet Plug KV(RPM/Volt): 5400KV Max RPM: 50000 Max Voltage: <8.4V Max Current: 59A Resistance: 0.0042 Weight: 107g Type: RC Model Package Includes: 1 x Motor