The NGK Laser Iridium Spark Plug is constructed with a long life and superior performance in mind. Laser-welding technology is precise and decreases the voltage needed to bridge the gap. A trivalent metal plating provides optimum anti-corrosion and anti-seizing properties. Durability and a slow wear rate are ensured by the iridium disc on the center electrode and a platinum disc on the ground electrode. Triple-sealing virtually eliminates gas leakage. 60 day limited manufacturer warranty. Specifications: Electrode Core Material: CopperElectrode Tip Material: IridiumThread Size: 14mmWrench Diameter: 5/8 InchReach: 0.75" Triple-sealed to prevent leakage Reduced emissions and better fuel economy | NGK Laser Iridium Spark Plug 4095 in Platinum