4 Pole 12 Slot Hi-torque Motor Design. CNC Machined 6061 T6 Billet Aluminum Heatsink Can, High Purity Copper Windings Maximizes Efficiency, High RPM ABEC5 Oversized Bearings. Universal fit, for all 1/10 Brushless cars-multi-mounting system for M3 screws. Precision balanced rotor, smoothness for best reliability and maximum RPM.Stator - Super Thin (0.35mm) Laminations. Precision Engineered for maximum Energy Conversion. Motor Type: Sensorless Brushless Motor. For 2S Lipo or 6 cells NiMH. On-road: 3660-Size or smaller motor with the KV. Off-road/Buggy/Monster: 3660-size or smaller motor with the KV. For 3S Lipo or 9 cells NiMH. BEC Output: 5.8V/3A (Switch mode). Dimensions/Weight: 51.5x68.5x38.5mm/76g.