Feature: 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 / 0.6ozOuter 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 Note: As shown in the figure, the screws equipped with the extender need to be installed with a 6mm wrench