Replated, single-sheave original alternator pulley designed for use on a Ford 428 Cobra Jet engine equipped with air conditioning and power steering. Service part number C5AZ-10344-K, with stamped engineering number C9AF-10A352-A3 or C9AF-10A352-B. I have one pulley with no stamped engineering number. Some of the pulleys have small marks from use. The listed price is for one pulley.