Premium Durability:Crafted with high-grade bearing steel for sweat resistance, and long-lasting wear resistance. Dual-sided sealing locks in lubricant ensuring smooth steering Precise Sizing:Designed for bicycles requiring a 45° chamfer angle. Ideal for mountain bikes, road bikes,please confirm measurements match before purchase. Silent Smooth Operation:Chromium steel construction,with low-noise rotation and effortless handling. Perfect for reducing front-end squeaks and rough steering during rides. Easy Installation:Direct replacement design simplifies installation,no adjustments needed. Rugged rubber seals for dustproof,waterproof performance. Service: We are proud of the quality of our products, if there is product damage or quality problems, we will deal with the first time Description: Bearing Headset suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on. Specially use for Bicycle Headset. Specification: Material:Steel Color:Silver External Diameter41.8MM Size Approx. 41.8 * 30.15 * 6.5mm * 45°/1.6 * 1.2 * 0.3inch * 45° Weight:Approx. 46g Package List 2 Pcs x Bearing Headset