The product is a genuine NGK 3133 Nickel Spark Plug with the manufacturer part number BPZ8HS-10, designed for use in Mariner, Mercury, and Evinrude engines. This spark plug is specifically made of nickel, a durable and reliable material known for its conductivity and longevity. NGK is a reputable brand in the automotive industry, ensuring high quality and performance for ignition systems. This spark plug is a crucial component for maintaining the efficiency and reliability of the engine's ignition system in various compatible vehicles.