FSA Carbon Headset SpacersComplete your road bike's FSA themed cockpit with these FSA Carbon Headset Spacers. Sold individually, they enable you to position your handlebar stem to your exact height preference. These headset spacers are made from carbon fibre, which is tough and durable, but won't add unnecessary weight to your road racing machine.Features: Material: Carbon Fibre For Steerer Diameter: 1. 1/8" (28.6mm) Thickness: Separate 5mm and 10mm options Sold IndividuallyBuy FSA Components from Chain Reaction Cycles, the World's Largest Online Bike Store.