The product is a set of four Subaru spark plugs with the manufacturer part numbers 22401AA781 and 22401AA780. These glow plugs are interchangeable with the part number 22401AA7800 and come with a warranty of one year. Designed specifically for Subaru vehicles such as the Forester, Impreza, and Legacy Crosstrek from 2011 to 2019, these spark plugs are a reliable and high-quality component for ensuring optimal ignition performance in your vehicle.