Features: 1. Constructed of quality and high-strength materials. Durable and not easy to rust. 2. The bicycle bearing of the sealing ring can be dustproof and waterproof, easy to use and long service life. 3. Lightweight and small size, easy to install and use. Upgrade your bike and bring a better experience. 4. Suitable for most road bike, mountain bikes, track bike, etc. Also suitable for modified, DIY, upgrade the bike. 5. Non-ball bearing parts. Suitable for the common full concealment, press-in semi-concealment and external bearing headsets. 6. 5 sizes available, please confirm the size before placing an order. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: steel Size: As the picture shown Color/Style: As the picture shown Package List: 1 x Bike Bearing Ring