Nickel Spark Plug by NGK NGK standard plugs are constructed for longer life and optimum performance. Features Trivalent metal plating Corrugated ribs Pure alumina silicate ceramic insulator Copper core aids in heat removal Triple seals prevent leakage Benefits Prevents flashover Provides superior anti-corrosion and anti-seizing properties Provides superior strength and better heat transfer Applications Universal What’s In The Box? 1 – Nickel Spark Plug Warranty 60 Day Warranty