Provide Extra Space - Eextended tube can assemble more items such as light or bicycle computer or phone or bell holder etc Lightweight and Durable - Aluminum Alloy Material, only weights 1.69 oz Bar Length: 10.2cm, Clamp Length: 9.5cm Thick Rubber Straps Gaskets - On the inside of the ring that mounts to your bars for strong and secure hold, won't slide and scratch your bars. Easy Installation Quick Release - With a Allen Key Wrench, you can install and disassembly the extension bracke easily. Fit for Most Bikes' Flat Handlebars - Can be installed on Normal Size(25.4mm) and up to Over Size(31.8mm) handlebar 25.4mm handlebar need to add gasket. (NOT work with riser bars) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.