DescriptionThis disk guide of a bicycle chain can guide the chain and protect the chain, which makes it not easy to jump and fall.It is strong and made of aluminum alloy, has a high hardness, can be used for a long time.It is used for a single disc's cogwheel, using it can make the trip softer, which gives you a good driving experience.The installation is simple and fast, and you can use the key to adjust it, without the need to delete your cranks.It is suitable for mountain bike, designed with a compact size and is light, the surface is soft and free of burrs.Specification:Material: Aluminum alloy.Black.Size: 12 * 10 * 5 cm.NoteThere may be some color distortions due to different computer resolutions.There may be mild errors due to the measurement of the different hand.Package includes:1 * Chain guide.4 * Board.1 * frame protector.