Quality Bike Headset CapCarbon fiber bicycle headset spacers are more resistant to corrosion, more hard, lighter than aluminum alloy headset spacer, good strength and heat resistance, good impact resistance, suitable for 28.6mm front stem fork of most bicycle, mountain bike, road bike.Headset Stem Spacer Set4pcs full carbon fiber bicycle mountain bike headset fork washer spacer in 4 sizes 5mm, 10mm, 15mm, 20mm, provide various combination to adjust height of handlebars to fit your riding style.Mountain Bike Parts ReplacementIf you need to raise your handle bar, use these spacers. One way to lighten up your bike is to replace your metal spacers with these super light 100% carbon fiber spacers.Easy to InstallOur headset spacer is constructed of full carbon fiber, durable and exquisite workmanship. Carbon fiber, easy to install, corrosion resistant, lightweight and easy to install, perfect to get a good fit on your bike.