ACDelco 96476119 Professional Conventional Spark Plug, Pack of 1 Copper-core center electrode helps improve heat transfer to plug tip for reliable spark and improved resistance to low-speed carbon fouling Nickel-chrome alloy ground electrode and center electrode sheathing resist wear from spark erosion and corrosive combustion chamber environment Precisely engineered and manufactured to provide everyday efficient performance Hot-tip insulator heats fast and fires hot delivering consistent combustion 12-month/12,000-Mile Limited Warranty