About this item Package Content: You will get 18 pieces of bicycle headset spacers. There are 4 sizes in total: 9 pieces of 10mm/0.4inch, 3 pieces of 5mm/0.2inch, 3 pieces of 3mm/0.1inch, and 3 pieces of 2mm/0.08inch. This size and quantity can meet your daily needs. Premium Material: Our bike handlebar stem spacer is made of quality aluminum alloy, which is very strong and not easy to wear and tear, you can rest assured to use it for a long time. Easy to Install: This makes the bike headset spacer very easy to install, not easy to deform, can effectively adjust your grip, and it is suitable for most bikes. Suitable Size: Aluminum headset spacer inner diameter is 28.8mm, 1-1/8″ headset spacer set, compatible with 25.4-28.6mm MTB, BMX, mountain bike, road bike, and other front forks. Wide Application: Our bicycle handlebar headset spaces are compatible with many models, such as front forks of BMX, mountain bikes, road bikes, etc. Reminder: Please confirm the size before purchasing.