Durable Construction: Built to withstand high temperatures and pressures in your watercraft's engine Precise Spark Gap: Features a 0.025-inch gap for optimal combustion and performance Copper Core: Solid copper core ensures excellent heat transfer and durability Wide Compatibility: Fits a variety of watercraft models from Yamaha, Sea-Doo, and Kawasaki Sealed Design: Triple-gasket sealing process prevents leaks and ensures a secure fit Experience optimal performance with our NGK BR8ES-11 Standard Spark Plugs, designed for watercraft enthusiasts. These spark plugs feature a solid copper core for enhanced heat transfer and durability, ensuring reliable ignition in your marine engine. With a gap size of 0.025 inches, they provide precise spark timing for improved combustion efficiency. Each pack contains 12 spark plugs, making them ideal for multi-cylinder engines. Upgrade your watercraft's ignition system with these high-quality NGK spark plugs today.