Bike Stem Headset Top Cap Aluminum Alloy Bicycle Headset Top Cap Bike Fork Expander Bung-Gold-

Feature: Aluminum alloy headset top cap bike fork expander bung for 1 inch(24.5mm) or 1.25 inch(28.6mm). Replaces conventional star nut and top cap, a must for bike steerers. Can be used repeatedly, bite tight, does not hurt the fork, a must-have for top-grade bicycles. Eliminating the risk of damage and providing added support to the fragile top edge of the steerer. Just use the hexagon wrench and then you'll get it installed in minutes.  Specification: Material: Aluminum Alloy Color: Black, Red, Blue, Golden (Optional) Size: Approx. 5 * 3.2 cm / 1.96 * 1.25 in Weight: Approx. 50-55g Package List: 1 * Bike Stem Headset