[High Quality Material]: The bike chain cover is made of high quality material, durable, lightweight and long using time. [Bike Chain Protector]: The bike chain guard is designed for protect your bike chain from dust, water, stone, etc. [Installation Instructions]: 1. Take out the center shaft. 2. Put it into the fixed bracket 3. Reinstall the center shaft 4.Please make sure the bracket is properly installed and do not install upside down. 5. Reinstall the chainring. 6. Reinstall the chain. 7. Install the chain cover. 8. Fix the chain cover with screws. 9. Fix the tail of chain cover. (please pre place the hole.) Folding bike chain cover style: Standard Color: Black Material: ABS Package Contents: 1 x Bicycle Chain Cover kit 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.