Vktech&reg; GUB Carbon Bike Bicycle Handle Bar Extender Mount CNC Aluminium Lamp Bracket Holder G-329 GUB G-329 Fits on to your bike handle bars to add extra storage space for your bike lights, GPS or phone etc Product characteristic: the 6061 aluminum alloy material CNC turning process, a column using 3 k carbon fiber body, stent surface anode processing of color, used in bicycle fittings such as loading headlights spec, saves the handlebars Super light CNC Aluminium body with a carbon extender bar Suitable for installation handlebar diameter 31.8 mm (25.4 mm handlebar need to add gasket) Fixed the column diameter 22.2 mm Material: aluminum alloy 6061 + carbon fiber