1. This mountain BMX bike brake caliper is made of good-quality metal materials, with relatively good quality and strong durability. It is equipped with an XT disc brake fixing device made of XTR material, which can ensure good braking performance during the bike's ride and ensure riding safety. 2. It is paired with M6 titanium alloy screws and concave-convex washers, with a specification of 2 concave washers and 2 convex washers. This unique specification design not only allows the brake caliper to be fixed better but also can remain stable during long-term use and is not easy to loosen, providing reliable support for riding. 3. It is quite popular in regions such as Europe, South America, Southeast Asia, North America, and Northeast Asia, and can meet the needs of cycling enthusiasts in different regions. 4. With good materials and fine manufacturing processes, this brake caliper is a good choice for mountain BMX bikes.