Features: Fits 1-1/8" Road and Mountain Bicycles Stems and Forks. Aluminum Alloy MTB Headset Spacer&Top Cap. Light weight, strong pressure resistance, not easy to deform and 28.6mm diameter is suitable for majority of bicycle headset. Comes Anodized,Colorfast Surface,Ultra Precision Diamond Blade Machine Cut.Multi-size for You to Adjust The Appropriate Height. Package includes(9PCS):Aluminum MTB Stem Spacer *6pcs, Stem Top Cap Cover*1, Headset Bolt*1, Expansion Bolt*1. Specifications: Material: aluminum alloy+stainless steel Color: black, blue, gold, red Spacer outer diameter: 34mm/1.34" Spacer inner diameter: 28.6mm/1.12" Height: 2mm, 3mm, 5mm, 10mm Package Includes: 3pcs 10MM + 1pcs 5MM + 1pcs 3MM + 1pcs 2MM washer + 1pcs screw + 1pcs expansion bolt + 1pcs stem top cap cover note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!