Aluminium body with a carbon extender bar(70mm long). extended frame of bicycle handlebar extension. Ultra light carbon fiber. 35 g of bracket of aluminum alloy material. the whole CNC process. suitable for 31.8 caliber handlebar use. Round small for the carbon fiber material 22.2MM diameter suitable for the installation of a variety of cycling equipment. GUB G-229 / Fits on to your handle bars to add extra storage space for your bike lights,flashlight,stopwatch,GPS or phone etc.