1High RPM ABEC5 bearing is precision and durable with low noise and small friction. 2High purity copper windings maximizes efficiency, heat resistance 180-200C. 3CNC machined billet, 6061-T6 aluminum heatsink. 4Secondary oxidation treatment for exquisite appearance. 54 Pole 12 slot high-torque design. Features:1. 4 Pole 12 slot high-torque design.2. CNC machined billet, 6061-T6 aluminum heatsink.3. Secondary oxidation treatment for exquisite appearance.4. High purity copper windings maximizes efficiency, heat resistance 180-200C.5. High RPM ABEC5 bearing is precision and durable with low noise and small friction.6. Precision waterproof design, maximum power conversion7. Suitable for 1 / 10, 1/8 RC car.8. Accurate balanced rotor for smoothness, high accuracy and maximum RPM.9. The dynamic balance is controlled within 10mg.10. Rotor is removable and replaceable.11. Ultra-thin silicon steel sheet: excellent performance, high magnetic permeability, highsilicon content, good insulation and heat resistance.12. Waterproof design ensures safe operation, which extends its service life.Specification:Condition: 100% Brand NewItem Type: RC AccessoryMaterial: MetalColor: As Shown in the PictureOptions: 3100KV, 4200KVWeight: Approx. 275-276g Applicable Product: for all 1 / 10, 1/8 RC car KV(rpm/volt)31004200Max voltage15VMax amps80A80ARotor poles