stoc spec motor 10.5T Description: Brand: Surpass Hobby Item: 540 Sensored Brushless Motor Shaft:3.175mm Stock Spec:strong magnetism, large torque, explosive force F Motor 17.5T,4000KV Features: 1. The silicon steel sheet were imported from original Japan,with the thickness 0.35mm. 2.Using the top quality EH magnet. 3. With the original Japan-made NMB bearings. 4.The shell was made by high precison CNC machines from Taiwan. 5.This motor supports the 120 amp ESC with Turbo function. Package included: 1x Motor(with manual)