brand new and high quality Features: This bike chain single-disc guide can guide the chain and protect the chain,making it not easy to jump and drop. It is strong and made of aluminum alloy,it features high hardness,can be used for a long for time. Ultra-light high-strength 7075 aluminum alloy, high-quality CNC processing, light weight but high strength It is used for single-disc sprocket,using it can make the ride smoother,providing you a good riding experience. The installation is simple and fast,and you can use wrench to adjust it,no need to remove your cranks. It is suitable for mountain bike to use,it designed with compact size and is lightweight,the surface is smooth and burr free. Bicycle Chain Guide only, other accessories demo in the picture is not included! Specifications: Material: 7075 Aluminum Alloy CNC; Nylon Frame Protector Diameter: app.35-31.8mm/1.38-1.25in(Detail size please see size pictures) Weight: app.52g Color: Black Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Bicycle Chain Guide