ACDelco Gold (Professional) Remanufactured Friction Ready Disc Brake Calipers are the high quality alternative to Original Equipment (OE) parts. They use both aluminum and iron castings. These loaded calipers contain Ethylene Propylene (EPDM) rubber components to provide superior resistance to heat, corrosion, and leakage. ACDelco Professional Remanufactured Friction Ready Disc Brake Calipers are developed without attached brake pads, allowing customization for the application at hand. Bleeder screws, copper sealing washers, hardware, and mounting brackets are all included for easy installation. 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.