The product is a Champion spark plug with the model number QL16V specifically designed for use in marine engines. Champion is a well-known brand in the automotive and marine industry, known for producing high-quality spark plugs. This spark plug is essential for the ignition system of a marine engine, ensuring proper combustion and engine performance. It is designed to provide reliable spark and durability in marine environments, making it a crucial component for maintaining optimal engine function on boats and other marine vessels.