DuraGo BR511902 Rear Solid Disc Premium Electrophoretic Brake Rotor Electrophoretic Coating provides a highly corrosion-resistant finish Corrosion and chemical (brake cleaner) resistant finish with the Electrophoretic coating providing superior salt spray protection (per ASTM B-117/ISO 9227) Premium core technology allows for tighter tolerances and cleaner castings Machine balanced for smooth braking Multiple vane configurations for heat dissipation