Features: Mountain bike chain guide is fit for 26T to 36T single 1X sprocket blades. Not compatible with oval sprocket blades. This chain guide helps prevent chain drops and reduces chain bounce, resulting in a smoother, more stable ride. The chain guide can hold the chain firmly in the proper position, avoiding chain wear and deformation while riding. The chain guide is made of high strength aluminum alloy, which is strong, durable, lightweight and rust resistant. Simple and easy installation adds to the appeal, perfect for replacing old and broken, convenient for using. Specification: Material: Aluminum alloy Color: Black/ Titanium Color (optional) Size: 6*6*3cm/ 2.4*2.4*1.2in Weight: 22g/ 0.8oz Package List: 1 * bike chain guide