The NGK 7543 CMR7A Nickel Spark Plug is engineered for reliable performance and longevity. This spark plug features a nickel alloy center electrode and a solid copper core, ensuring excellent heat dissipation and conductivity. The high-grade alumina silicate ceramic insulator offers superior dielectric strength, while the triple-gasket sealing process prevents combustion gas leakage. Ideal for various small engine applications, this spark plug provides consistent ignition and improved fuel efficiency. The trivalent metal plating offers enhanced anti-corrosion and anti-seizing properties, making installation and removal easier.