Features1Made of aluminium alloy, sturdy, lightweight, anti-rust, non-deformation and durable for long time 2Simple and colorfast surface, good appearance adds much more fashion to your bike 3Can ly protect chain from falling out 4Easy to install without disassembling cain ring out 5Useful tool for bike owner to make the bike betterSpecificationFeatures:Made of aluminium alloy, sturdy, lightweight, anti-rust, non-deformation and durable for long time. Simple and colorfast surface, good appearance adds much more fashion to your bike. Can ly protect chain from falling out. Easy to install without disassembling cain ring out. Useful tool for bike owner to make the bike better. Specification:Material: Aluminium alloy + NylonColor Options: Black; RedApplicable Bottom Bracket: ISCG 03 Bottom BracketApplicable Chain Ring Range: round for 30-40T / oval for 30T-38TSize: As picture shownWeight: Approx. 40gPackage Included:1 x Bike Chain Guide 2 x Washers 2 x ScrewsOther items in picture are not included.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.Package List