Prime Choice Auto Parts R4485 New Rear Brake Rotor High quality, brand new brake rotors Manufactured to meet or exceed expectations for performance and fit. Designed to obtain peak performance under all braking conditions Precise tolerances offer maximum performance, increased comfort, and extended longevity of all brake system components Machined surface to ensure synergy between the brake pad and brake rotor during the break in period Venting design (when applicable) increases overall brake rotor cooling and provides additional protection against thermal cracking