Air Series Vented Rear Brake Rotor (BR950026-04) by DuraGo®. Air Disc Brake Rotors (DAS Series) are engineered for extreme durability and meet all requirements of fit, form and function. To ensure dependable performance, DAS 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 a long service life. Each brake rotor is coated with a Geomet® coating rebranded as DuraNetic™. DuraGo DuraNetic™ coating is a premium rust resistant barrier engineered with metal oxides, metallic zinc and aluminum flakes.