Feature: 1. Can guide the chain and protect the chain, making it difficult to drop, provide better cycling experience. 2. Made of high quality aluminium alloy material, firm and durability, provide longer service life. 3. Smooth surface without burr, will not hurt your hand while using, provide better protection to you. 4. Easy and fast to install, only need a few steps, can effectively save your time. 5. Light in weight and small in size, will not bring the burden to your bicycle, provide better use feeling. Specification: Item Type: Bike SingleDisc Chain Material: Aluminium Alloy Weight: Approx. 63g/2.2oz Color: Black Quantity: 1Set Package List: 1 x Chain Guide 1 x Screw 4 x Gasket 2 x Converter