ACDelco Specialty Performance (Fleet/Police) Remanufactured Loaded Disc Brake Calipers use both aluminum and iron castings for the best match to the original equipment design. 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. These loaded calipers contain high temperature silicone components to provide superior resistance to heat, withstanding temperatures up to 600 degrees Fahrenheit (316 degrees Celsius), while protecting against corrosion and leakage. ACDelco Specialty Performance (Fleet/Police) Remanufactured Loaded Disc Brake Calipers are developed with brake pads already attached - no assembly required. Also included are bleeder screws, copper sealing washers, hardware, and mounting brackets for easy installation. These disc brake calipers will provide the same performance, durability, and service life you expect from ACDelco. ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov