: 1. Material: Made of good plastic, light weight, good wear resistance, not easy to deform or break. 2. Protection: This chain guard protects the bicycle chain from scratches and friction, effectively prevents grease from entering the dirty chain, and prolongs the use time. At the same time, prevent clothing from being soiled. 3. Easy to install: Equipped with 8 screws. You only need to put on the protective cover of the bicycle crank and tighten the screws. 4. Ergonomic design: This plastic bicycle chain guard ring is light in weight and does not increase the burden of driving. The ergonomic circular design provides more traction, reduces leg or knee fatigue, and ensures smooth driving. 5. Strong compatibility: As long as your bicycle crank is 42T, this bicycle chain guard ring can be installed. It is an important part of mountain bikes, road bikes, etc. Specifications: Product name: Chain Guard Ring Color: Black Material: Plastic Size: About 10.1*7.4cm/3.98*2.91inch (distance between outer holes*distance between inner holes) Package Includes: 1Pc * Chain Guard Ring 8Pcs * Screw