Laser Iridium® spark plugs provide superior ignitability and long service life. Smallest tip diameter available Iridium / Platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions Laser welded Iridium center electrode tip  Platinum disc welded to backside of ground electrode provides long life  Trivalent Metal Plating for superior anti-corrosion and anti-seizing  Tapered ground electrode to minimize quenching Consistent and stable spark Faster starts and quicker acceleration  Better fuel economy and lower emissions Center Electrode Core Material Copper Core Center Electrode Tip Material Iridium Gap Size 0.044 in Ground Electrode Quantity 1 Hex Size 5/8" Insulator Height ISO Manufacturer Heat Range 6 Additional Info 5K Ohm Seat Type Gasket Reach 19mm Thread Diameter 14 MM Ground Electrode Tip Design Standard Ground Configuration Standard Ground Electrode Core Material Nickel Core Alternate/OEM Part Number(s): IFR6T11