Description: 【High Performance】: Headset stem washer has full automatic cutting technology, has a smooth edge, fits most mountain road bicycles, has delicate texture, and impact resistance, stable to use 【For 28.6mm Fork】: Carbon fiber spacer fits 1-1/8" road and mountain bicycle stems and forks, helping to raise your handlebar and make your biking more comfortable. 【Premium Material】: The bike headset spacer is made of 3K carbon fiber, is durable, has nice look, good strength and good temperature resistance, can be used for long time. 【Easy to Install】: The spacer is light in weight and compact in size, easy to install and disassemble. It great replacement gear accessory for bike cycling enthusiasts. 【Good Components】: Headset spacers are good accessories for bike repair and modification. It also can replace ordinary monotonous washers to decor your bikes Specification: Material: Carbon Fiber Inner Diameter: 2.86cm/1.13inch Wall Thickness: 3mm/0.12inch Type(Optional): 1/2/3/5/10mm Or 3/5/10/15/20mm(Includes 5 different sizes) Package Includes: 5 Bike Headset Spacer Note: Please allow slightly errors due to manual measurement and different monitors.