Description: High Performance: Headset stem washers have 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: Bicycle headset spacers fit 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 spacers are made of aluminum alloy, sturdy, have nice look, good strength and good temperature resistance, can be used for long time.Easy to Install: The bike stem spacers are light in weight and compact in size, easy to install and disassemble. Great replacement gear accessories 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:Aluminum Alloy Size Chart: Inner Diameter: 2.86cm/1.13inchOuter Diameter: 3.4cm/1.34inchType(Optional): 2/3/5/10/15/20mm (Includes 6 different sizes) Package Includes: 6 Bike Headset Spacers Note: Please allow slightly errors due to manual measurement and different monitors.