The product is a set of 5 Champion Spark Plugs with the manufacturer part number 851ECO. These spark plugs are designed for gasoline-fueled vehicles and are compatible with various models including BM7F, 6421, 5851, DJ6J, RDJ6J, RDJ7Y, 851EZ, E3 16, CHA, and RDJ. Champion is a well-known brand in the automotive industry, particularly for their ignition systems and components. These spark plugs are essential for maintaining the proper function of a vehicle's ignition system, ensuring efficient combustion and optimal performance.