Extra Long Bicycle Extender- The length of The Bicycle extender is 20 cm, suitable for bicycles with handlebar diameter between 18-34mm. (Please check the size carefully before buying and Please Note: Due to handlebar's different, please try to find a suitable position on your handlebar to install this extension to avoid easy slipping problem. ) Durable Carbon Fiber- Made of Carbon fiber material ,very lightweight and the clamps well designed and sturdy, It is not easy to rust or fade, corrosion resistant and durable. Double Clamp and Gasket Design- The double clamp for fixing can firmly fix the handlebar bracket. Double rubber pads protect your handlebar from slipping or scratching off the bar. Easy Installation- The screw buckle is durable. Use high quality screws, double protection. Equipped with hexagon wrench, easy to install and detach, use and adjust. Multifunctional Bicycle Extender-The practical bike rack adds extra space to your bike, used to fix bike lights, speedometers, GPS devices, smart phone racks, etc.