NGK Spark Plugs 5110 Spark Plug B7Hs Pack of 4. They resist carbon buildup and pre-ignition. Each features high alumina ceramics for better heat transfer and electrical insulation. A patented triple gasket sealing process eliminates the possibility of combustion gas leakage and a longer insulator nose prevents fouling and misfiring. A solid copper core and its nickel tipped electrode provide a longer plus life. Features of NGK Spark Plugs 5110 Spark Plug B7Hs Designed to operate over a much wider heat range than ordinary plugs Resists carbon buildup and pre-ignition High alumina ceramics for better heat transfer and electrical insulation Solid copper core and nickel tipped electrode provide a longer plus life Patented triple gasket sealing process eliminates the possibility of combustion gas leakage Package Contents: NGK Spark Plugs 5110 Spark Plug B7Hs NGK Spark Plugs 5110/3000.6711.1: 5110 Spark Plug B7Hs Pack of