NGK LASER IRIDIUM SPARK PLUGS OFFER THE BEST COMBINATION OF PERFORMANCE AND LONGEVITY. IRIDIUM TIPPED CENTER ELECTRODE PROVIDES DURABILITY SIX TIMES HARDER THAN PLATINUM. NGK'S HIGH-GRADE PURE ALUMINA CERAMIC AND 98% PURE COPPER CORE PREVENTS THE SPARK PLUG FROM OVERHEATING WHILE PROVIDING RELIABLE STARTS. SIZE (16/16)
