Features Spark plugs are designed to operate over a much wider heat range than ordinary plugs; 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; Solid copper core and its nickel tipped electrode provide a longer plus life; Longer insulator nose prevents fouling and misfiring; Specifications Dimension: 0.89" H x 0.98" W x 3.43" L; Weight: 0.12 lbs; .