Features: *1. Made of high-quality stainless steel, anti-rust, anti-deformation, and not easy to wear. *2. The installation is simple and convenient, without the use of any special tools. *3. It is used in the position where the original bicycle has no disc brake installed, and it is used for refitting the disc brake. Description: *1. Material: steel *2. Color: black (as shown) *3. Length: 51 mm *4. Disc Size: 160 mm *5. Clamp Size: 22 mm/31.8 mm(Optional) *6. Weight: about 70 g Package includes: Disc brake bracket *1 Note: 1. All pictures are professionally color-coded, but due to the difference of ambient light and display equipment settings, there may be some deviation between the pictures you see and the objects themselves, please understand. 2. The data is measured manually, and there may be some deviation, but it does not affect the use.