Nukeproof Headset Top Cap and Star NutThis genuine replacement top cap and star nut set will look great on any bike. As Nukeproof components and accessories are designed and built to withstand the harshest of riding conditions, this headset accessory is guaranteed to perform at the highest level.Click here to view how to change and fit your Nukeproof Top Cap.Features: Material: AlloyBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.