The product is a set of 10 OE rockers arms designed for Ford Mustang, F-150, and F-250 engines with 4.6L or 5.4L 3V engines. The rocker arm set is a direct replacement with the manufacturer part number 3L3Z6564BA. Made of steel, these rockers arms are durable and ensure proper valve operation for engine performance. The product comes with interchange part numbers for easy identification and compatibility with the specified vehicles.