ACDelco Gold (Professional) Remanufactured Loaded Disc Brake Calipers are a high quality alternative to Original Equipment (OE) parts. These calipers use both aluminum and iron castings. These loaded calipers contain Ethylene Propylene (EPDM) rubber components to provide superior resistance to heat, corrosion, and leakage. Remanufacturing disc brake calipers is an automotive industry practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and are end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. ACDelco Gold (Professional) Remanufactured Loaded Disc Brake Calipers are developed with Professional brake pads already attached - no assembly is required. Also included are bleeder screws, copper sealing washers, hardware, and mounting brackets for easy installation. These loaded disc brake calipers will provide the same performance, durability, and service life you expect from ACDelco.