Proven Quality Air Disc Brake Rotors are engineered for extreme durability and meet all requirements of fit, form, and function. To ensure dependable performance, Proven Quality Brake Rotors are manufactured in IATF 16949:2016 certified facilities with premium ASTM G3500b metallurgy. Our utilization of ASTM G3500b metallurgy and leading-edge casting design provides better tensile strength and excellent heat dissipation resulting in dependable performance and long service life. Each brake rotor is coated with our exclusive DuraNetic¿¿¿ corrosion-resistant coating. Our DuraNetic¿¿¿ coating is a premium rust-resistant barrier engineered with metal oxides, metallic zinc, and aluminum flakes. The zinc and aluminum particles align in multiple layers forming a metallic inorganic silver coating to ensure ultimate corrosion resistance.