Welcome to Kedai Basikal Orbit Cycle!
Use for 1-1/8" (28.6mm) Stem. These are Brand New Carbon Fiber Headset spacers in 100% carbon fiber. These are for oversize forks and stems at 1 1/8". It is 5-10-15-20mm high. It is perfect to get a good fit on your bike. If you need to raise your handle bar, use these spacers.