The product is a set of 12.64 inch front brake rotors designed for 2019-2023 Buick Envision and Cadillac XT4 vehicles. This custom bundle includes two disc brake rotors from the Carquest brand, featuring a plain rotor style and a vented design for improved cooling. The rotor outside diameter is 12.64 inches, and they are coated & polished for durability. These brake rotors are a direct replacement for the OE/OEM part number 13517848, making them a reliable choice for automotive brake replacement needs.