Features： 1、Solid and Durable: With sealed double bearings which is sealed waterproof and free maintenance, the bike headset is strong and easy to use, when rotate flexibly anti infiltration silently. 2、Exquisite Workmanship: Adopting CNC process, the bearing headset is anodic oxidation coloring with smooth surface, not easy to fade fiting ly with your bike. 3、Cutting Edge Technology: Built in oil seal waterproof technology. If you put the oil seal into the edge of the headset, the headset cover will be thinner, so that the whole headset integrated. 4、Superior Texture: Made of high quality aluminum alloy material, the bicycle headset is rust proof, durable, safe and reliable, corrosion resistant, tough and will not be deformed. 5、Great Accessory: The headset is an useful accessory for replacing old headset of bike, which gives you a wonderful cycling experience and is the best choice foe bike lovers. Specification： Item Type: Bicycle Headset Set Product Material: Auminium alloy Weight: Approx. 90g / 3.17oz Product Model: DH-411 Application: For 41mm straight fully concealed head tube frame with 28.6mm standard straight tube front fork Package List： 2 x Bearing 1 x Star Nut Assembly 2 x Gasket 2 x Headset Cover