1、4 pole 12 slot high torque motor design and CNC processed 6061 T6 aluminum billet heat sink, the motor can work for a long time. 2、High purity copper windings with a shaft diameter of 3.175mm/0.1in can maximize efficiency. 3、Precise balanced rotor has the best smoothness for high reliability and maximum RPM. 4、The 60A brushless waterproof ESC design has better performance and wider application range. 5、Using high quality aluminum alloy and plastic, the motor set is durable and fit for 1/10 brushless remote control cars. Item Type: F540 4370KV Brushless Motor with 60A ESC Material: Aluminum Alloy + Plastic Product Color: As Pictures Shown Product Weight: Approx. 256g / 9.0oz Compatible: Fit for 1/10 RC Car Motor Parameters: Shell Material: Aluminum Alloy Product Color: Blue Height: Approx. 50mm / 2.0in Diameter: Approx. 36mm / 1.4in Shaft Length: Approx. 15mm / 0.6in Shaft Diameter: Approx. 3.175mm / 0.1in KV Value: 4370KV (9T) Wattage: 820W Maximum Current: 66A Maximum Speed: 50000 RMP ESC Parameters： Continuous Current: 60A Peak Current: 320A BCE Output: 5.8V/3A Product Applicable Battery: 2-3S Li-Po / 4-9S Ni-Mh Ni-Cd (not included) 1 x Motor 1 x ESC 1 x Manual