Features: 1. Made of high-quality materials, with excellent wear resistance and corrosion resistance. 2. Designed specifically for mountain bikes, it can effectively improve braking performance and stability. 3. Provide different size options, including 180mm, 160mm, and 203mm, to meet the needs of different vehicle models. 4. Six nail brake disc design, easy to install, stable and reliable. 5. It has good heat dissipation performance, effectively reducing heat accumulation during braking and extending its service life. Specifications: Material:stainless steel Specification:21*21*1cm Gross weight: about 110g-190g Packaging: color box Package Includes: Brake discs* 1 pcs Notes: 1. Please allow 1-2 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.