Feature: 1. durability. Not afraid of humid, muddy or dusty environments. 2. The brake disc is made of highquality aluminum alloy, lightweight and durability. 3. The disc brake disc is not easy to deform, rustproof, nonfading, and stable in use. 4. Disc brake disc have excellent capabilities, showing stable performance in wet or dry conditions, smooth braking and good grip. 5. Suitable for XIAOMI PRO electric scooter. Specification: Item type: Disc Brakes Disc Material: Aluminum alloy Color: silver Weight: Approx. 226g Diameter: Approx. 120mm/4.7in Diameter between two holes: Approx. 25mm/0.98in The distance between the two holes in the middle diameter: Approx. 40mm/1.6in Package List: 2 x Disc Brakes Disc 10 x Screw Note: Manual measurement, allowable error 12MM.