The set includes 2838 4500KV 4P sensorless brushless motor and 35A ESC. The motor is perfect for 1/14 1/16 1/18 RC Car. It is built from high quality aluminum alloy which is produced from the latest CNC milling machines. Thus it can provide longer run time with high efficiency, high power and rotation speed. And the ESC is made from the highest quality components to ensure high efficiency operation. It Features enhanced throttle response, excellent acceleration, strong breaks and throttle linearity, which is suit for 1/14 1/16 1/18 RC Car.Red and blue random delivery. Features of Motor: 4 Pole 12 slot hi-torque motor design High purity copper windings maximizes efficiency CNC machined 6061 T6 billet aluminum heatsink can High RPM ABEC5 oversized bearings Precision engineered for maximum energy conversion Short stator, less wire, lower resistance, more power Precision balanced rotor,smoothness for best reliability and maximum RPM Suit for 1/14 1/16 1/18 brushless cars-multi-mounting system for M2.5 screws Specifications of Motor: KV(RPM/Volt): 4500KV Max current: 50A Max watts: 600W Max voltage: