Features: 1Hollow Design: This bike disc brake rotor has a hollow design for fast heat dissipation, fast ventilation and excellent performance. 2Lightweight Design: This disc brake sheet is designed to be lightweight so that it does not add extra weight to the bike and is burden free. 3Corrosion Resistant: The abrasion and corrosion resistant properties of this bike brake accessory make it even more attractive. 4Replacement Repair Parts: This brake disc can be used as a replacement part to replace and repair the damaged original parts and prolong the service life of the bike. 5High Hardness: Made of premium steel, high hardness, rustproof and sturdy, has long service life, perfect bike replacement accessories. Item Type: Bike Disc Brake Rotors Material: Steel Gross Weight: 222g / 7.8oz Diameter: Approx.120mm / 4.7in Package Included: 2 x Bike Brake Disc 12 x Screw