Bicycle Headset Cap 28.6mm Universal Diameter MTB Mountain Bike Top Shell Flat Cover CNC Metal O-ring Seal Feature: *1.Applicable to standard 28.6 diameter pipe, and the headset should be a concealed 44mm upper headset. *2.It can be modified into a flat cover style to reduce the height of the front. *3.CNC processing of all-aluminum alloy, up to 4.9mm thickness.?? *4.The inner ring of the headset cap has an o-ring seal, which can closely fit the fork standpipe. *5.The outer ring of the headset cap is covered with a dustproof rubber cover, which can effectively cover the gap between the headset cap and the headset. Specifications: Material: Aluminum alloy Optional color: Black, Red, Blue, Green, Gold (As shown in the picture) Size(Approx): Outer diameter: 47.6mm Inner diameter: 28.6mm Thickness: 4.9mm Package Contents: 1 * Headset Cap Note: 1.All pictures are professionally color-coded, but due to the different ambient light and different display device settings, there may be some deviations between the pictures you see and the items themselves. Please understand. 2.The data is measured manually, there may be some deviation, but it does not affect the use.