Features: Efficient braking enhances Cycling safety and is suitable for various types of bicycles. Consist of wear-resistant component, durability; Easyly to install. Suitable for professional cyclists and bicycles enthusiasts who pursues high performances and safety. Suitable for various cycling environment such as commuting, mountain biking, and long-distances travel. The unique ventilation of the disc brake Rotors help accelerate air circulation around the brake and facilitates heat dissipation. Specifications: Color:Three Elections Dimension:14mm/5.51in 160mm/6.3in 18mm/7.09in Component:Metal Package Includes: 1Set Bicycles disc brake note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.