This case protector is designed to protect your front sprocket -- in addition to protection, it provides a window to view the condition of the front sprocket and access to clean/remove debris, unlike the stock cover. Each case comes with a fitted chain slider to help reduce chain rattle at low engine speeds. Condition: Installation: For RS660 2020 2021 2022 2023 Notice: We recommend using thread locker on all bolt threads. Periodically check that all mounting bolts are tight. Material: Metal colour: red Package Contents: 1 set x Motorcycle Chain Protector 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.