Features： 1、Beautiful Appearance: The surface is colored by PVD vacuum coating, which enhances the hardness, the color is beautiful, and it is not easy to fade. Appearance in a unique shape. 2、Aluminum Alloy: Made of high strength aluminum alloy, the hardness is higher than that of steel, and the top cover of the headset is not easy to deform. 3、Scope of Applications: This aluminum alloy bike bowl set cover is designed for bike stems, with an outer diameter of 31.8mm/1.3in, suitable for most bike stems. 4、Protection: Aluminum alloy stem cover can prevent your bike stem from dirt. At the same time it can make the bike look cooler and more fashionable. 5、Durable: The bike stem cover is lightweight and has strong pressure resistance, so there is no problem in long term use. Easy to carry and use when going out. Specification： Item Type: Bike Headset Cover with Screws Material: Aluminium Alloy Gross Weight: Approx. 17g / 0.6oz Outer Diameter: 31.8mm/1.3in Application: Most tail hooks are compatible, but some tail hooks need to be modified by yourself! Package List： 1 x Headset Top Cover 1 x Screw