Feature:1. RUST PROOF ALUMINUM ALLOY: Made of good quality aluminum alloy material, rust proof, durable, possess good strength and corrosion resistance2. GUARANTEE PERFECT FIT: Road bike headset bearing adopt fine machining to ensure a for a perfect fit on your bike3. NON FADE: Front fork stem headset bearing is produced with CNC process, anodized coloring, not easy to fade, more durable4. PREVENT FROM DUST AND WATER: Cover helps keep out dust and water for extended durability, useful and practical, light weight and portable5. UNOBSTRUCTED AND LABOR SAVING: The upper and lower of headset use double bearing structure, and unobstructed, labor saving and easy to protectSpecification:Item Type: Road Bike Headset BearingProduct Material: Aluminum alloyProduct Style: DH-497Product Application: Applicable Tapered Head Tube Frame: Approx. 44 ~ 49.7mm / 1.73 ~ 1.96inApplicable Standard Straight Front Fork Pipe: Approx. 28.6mm / 1.13in Package List:1 x Sunflower Assembly 2 x Press Ring1 x Top Cover1 x Upper Bowl1 x Lower Bowl