Features 1、Copper Windings and Bearings: High purity copper windings and sealed bearings are durable, with low friction and low noise. 2、Welding Guide: Excellent torque and long life, direct welding wiring guide, providing flexible welding options. 3、Accurately Balanced Rotor: can achieve maximum energy conversion, smoothness improves reliability and maximum speed. 4、High Purity and Strength: High purity copper winding maximizes efficiency, and high strength magnets provide stable brushed motor performance. 5、Rotor Function: Rotor is precisely balanced, with high smoothness, good stability, excellent performance, and easy disassembly and assembly. 6、550 Brushed Motor: High torque is used for drifting of climbers and bicycles, bidirectional bearings have strong magnetic force, low heat generation, and high power. Item Type: 550 Brushed Motor 320A ESC Color: As Pictures Shown Material: Plastic + Copper Weight: Approx.270g/9.5oz Motor: Operating Voltage: 7.4-12V Motor Length: Approx. 60mm/2.4in (without Shaft) Motor Diameter: Approx. 36mm/1.4in Shaft Diameter: Approx. 3.175mm/0.1in Motor Shaft Length: Approx. 11mm/0.4in 320A ESC: Working Voltage: 5-11V NI-MH, NI-CD Group 4-6S: (4.8 V - 7.2 V) Lithium Battery 3S: (7.4V-11.1V) Power Supply: 2~3S Lithium Battery, Ni-mh Battery 5~9S BEC Output: 5 V / 2A (Receiver, Steering Gear Power Supply) Product Size: Approx. 43x29x27mm/1.7x1.1x1.1in (no Cable) Continuous Output Current: 320A (Forward), 160A (Reverse), 270A (Brake) Package List 1 x 550 Brush Motor 2 x Wiring 1 x 320A Brush ESC