describe: * brand new and high quality * Made of high-quality materials, and practical Specification: Product name: middle lock cover Material: aluminum alloy Weight: about 12g Compatible: 9-12-15MM Purpose: Installed on the center lock hub, so that it can install a six-pin disc Use 44MM hand tool for disassembly and assembly The package includes: 1* Middle lock cover 1. Due to various factors such as monitor brightness, light brightness, etc., the actual color of the product may be slightly different from the picture displayed on the website. 2. Please allow for slight manual measurement deviations in the data. Compatibility - Locking Disc Brake Hub Lock Ring for 9/12/15mm Axle Center Lock Cover forShimano Good Performance Materials - These bike accessories are made of premium material, ensuring their durability and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability to different cycling needs and provide optimal performance and reliable functionality enhance the riding experience and ensure safety. Easy Installation - These accessories can be easily installed on your bike to get your bike running again. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.