Material: good wear resistance, not easy to deform The most stable and firm force-bearing , scratch- disc brake design Designed to adjust the concentric position. Suitable for all oil discs and mechanical discs. No rivets will hit the disc brake. And the disc is extremely flat. Easy to install on your disc brake ready frame and fork When going downhill for a long distance, the disc will not become red and hot, which will greatly improve the of going downhill We have all the sizes you need, you can freely match the size you need Easy to install: Easy to install on your disc brake ready frame and fork, suitable for most brake calipers Colour:As Shown Material:steel Package Contents: 3 x Bicycle disc brake (140+160+180mm) with screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.