Features 1、Made of premium aluminium alloy, sturdy, lightweight, anti-rust, non-deformation and durable for long time 2、Simple and colorfast surface, good appearance adds much more fashion to your bike 3、Can perfectly protect chain from falling out 4、Easy to install without disassembling cain ring out 5、Useful tool for bike owner to make the bike better Features: Made of premium 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 perfectly 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 + Nylon Color Options: Black; Red Applicable Bottom Bracket: ISCG 03 Bottom Bracket Applicable Chain Ring Range: round for 30-40T / oval for 30T-38T Size: As picture shown Weight: Approx. 40g Package Included: 1 x Bike Chain Guide 2 x Washers 2 x Screws Other 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