Item Type: Motor Speed Controller Throttle Twists Grip Set Material: Aluminum alloy, Rubber Throttle Handle Caliber: Approx. 22.2mm/0.9in Controller Rated Voltage: 12V Controller Rated Power: 250W Controller Under Voltage: 8.50.5 Package List 1 x Motor Speed Controller 1 Pair x Throttle Handle Grip 1Excellent Heat Dissipation: The controller's housing can provide protection to the internal circuitry with excellent heat dissipation, thus avoiding security problems caused by thermal overload. 2Aluminum Alloy Controller: The housing of our speed controller is made of aluminum alloy, which is very strong and can be achieved long term use. 3Stable and Sensitive: Both the controller and grip can provide stable and sensitive speed control, allowing users to have better and comfortable operation. 4Comfortable Grip: The grip is made of comfortable and soft rubber material, which makes the grip more comfortable and not tired for long riding. Easy to install, the interface will correspond to it. 5Wide Range of Uses: Our controller grip set is widely applied to electric bikes, electric tricycles, electric motorcycles, etc.