Features: 1. Reduce fatigue: It is ergonomically designed to reduce the burden on hands during long-distance riding. 2. Simple installation: Reliable, only need to open and set the throttle handle, simple installation. 3. Convenient control: flexible use, long-distance riding only needs to hold the handlebar, and does not need to be tight. 4. Universal: The booster is suitable for most electric vehicles and motorcycle handlebars and is a universal accessory. 5. Material: The booster adopts nylon, which is a kind of thermoplastic resin, with high mechanical strength and hardness, and high rigidity. The surface of the booster has a matte texture and is not easy to slip, suitable for most electric vehicles and motorcycle handlebars. Specifications: Size: 51.5*77.2*34.7mm Color: black Suitable handlebar diameter: 28mm (can be slightly expanded) Application: electric car, motorcycle Material: nylon Package Included: 1* accelerator booster Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.