Features: 1. Provide effective protection for rear derailleur, prevent the derailleur was struck distortion or displacement in riding. 2. It can be used to install front-view lights to make your night travel safer. 3. Constructed of quality and high-strength materials. Durable and not easy to rust. 4. Lightweight and small size, easy to install and use. Upgrade your bike and bring a better experience. 5. Suitable for bicycles with quick release wheels, such as road bike, mountain bikes, track bike, etc. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Size: height 60mm/48mm Material: aluminum alloy Weight: 48mm-25.3g, 60mm-29g Color/Style: As the picture shown Package List: 1 x Bike Rear Derailleur Protectoronly