【High quality material】: TOP Material:Nickel,Core Material:Iridium.Hivehicle Purified alumina powder insulator from Germany ALMATIS(Model:HVA FG Q06) and Full-automatic isopressing;Iron shell(Model:20# 08 AL) and automatic welding/rolling bending;Central electrode Iridium alloy and 360 degree laser welding | 【Reduce the risk】:Hivehicle OE12621258 spark plugs Updated design reduce the risk of breaking off during working | 【Increases Fuel Efficiency】: G-Power Iridium Alloy Spark Plugs 12621258 offer superior performance with improved fuel efficiency, lower emissions, and quicker starts | 【Increased conductivity】: Increased conductivity and heat control for good overall. Stability: 0.5mm laser welded fine iridium tip reduces required voltage ensuring high durability and a consistently stable spark | 【Durability】: Trivalent Metal Plating offers superior anti corrosion and anti seizing properties while the triple gasket seal eliminates combustion gas leakage