The brushless motor has aluminum body and all copper coil with good heat resistance, ensuring the working effect. The large torque of 48V brushless motor, which can 4500 RPM, ensures high working efficiency. This electric motor kit has the natural air cooling fuction and pruduces low noise for improving your using experience. The brushless motor controller kit adopts high quality material for a longer service life. Suitable for DIY kart, scooter, electric bike, mopeds, mini bike, electric off-road vehicle, tricycle, DIY engine system. Item Type: Brushless Motor Kit Material: Aluminum Alloy + Plastic Weight: 5600g/197.5oz Product Size: Controller Case Size: 17.8×8.5×4.5cm/7.0×3.3×1.8in Controller current: 34A Motor Rated Speed: 4500rpm/min Rated Voltage: 48V Rated Power: 2000W. 1 x Pair of Throttle Grip. After all the necessary parts connected, then connect to power supply. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.