Description: Same size as a traditional brushed 540 class motor, suitable for all 1/10 scale RC Car Boat 4 poles Hi-torque motor design Large output power Precision balanced rotor, smoothness for best reliability and maximum RPM Copper wires of 180? high CNC machined 6061 T6 billet alumium Universal fit all 1/10 brushless cars-multi-mounting system for M3 screws Specification: Motor KV: 4370 Model: 9T Motor Max Current: 66A Max Watts: 820W Max voltage: 7.4V(2S)-11.1V(3S) Suitable ESC: 35A or higher Shaft : 3.17mm Shaft length: 15mm Bullet Connector: 4mm Gold Plug Input Battery Types: NiCd / Nimh / Li-po Battery Recommend Model: RC Model 1/10 Car Resistance: 0.0125ohm Rotor (Pole): 4-pole Outer Diameter: 36mm Height: 65mm Package Includes: 1 Piece RC Car 9T 4370KV Slotted Motor Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item Due to manual measurement, there may be 1-2mm error in size