The product is a set of 4 DENSO Iridium Long-Life spark plugs with the manufacturer part number FK16HQR11. These spark plugs are designed for high performance and durability, with a limited manufacturer warranty. Made in Japan, they are compatible with various vehicle models and are proven to provide reliable ignition for optimal engine performance. Upgrade your ignition system with these genuine DENSO spark plugs for improved efficiency and power output.