NGK Laser Iridium spark plugs provide superior ignitability and long service life. The fine wire iridium-tipped centre electrode and fine wire platinum-tipped ground electrode ensure a slow wear rate, offering stable idle, superior anti-fouling, improved fuel efficiency, and lower emissions. Features: Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator provides superior strength and better heat transfer. Copper core aids in heat removal. Triple seals prevent leakage. Specifications: Th read Diameter: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: ISO Gap: 0.043" (1.1mm) Centre Electrode: Material: Iridium Type: Fine Wire Size: 1.0mm Projection: Projected Ground Electrode: Material: Platinum Type: Standard Additional Details: Quantity: 1 Resistor: Yes Resistor Value: 5k Ohm Heat Range: 6 Torque Specifications: Cast Iron: 18–25.3 lb. ft. Aluminium: 18–21.6 lb. ft. Part Information: Brand: NGK/NTK Warranty: 60 Days Longevity: Up to 100,000 Miles