SPARK PLUG BOX OF 4

Resistor: Yes,Electrode Type: OEM,Electrode Core Material: Copper,Electrode Tip Material: Nickel Alloy,Insulator Type: Projected,Thread Size (IN): 0.551 Inch,Thread Size (MM): 14 Millimeter,Reach: 3/4 Inch,Seat Type: Gasket,Wrench Diameter: 5/8 Inch,Quantity: Single Copper-Glass Seal Bonds Insulator, Terminal Post Center Electrode Together; Assures Full Required Voltage At Spark Gap; Gas-Tight Seal (100 Percent Leak Proof),Multi-Rib Insulator Reduces Danger Of Flash-Over" One-Piece Terminal Post Adds Strength Cold-Formed Steel Shell Precision Rolled Threads Full Copper Core Electrode Provides Better Performance In All Conditions Guaranteed To Deliver Quick Starts Good Fuel Economy And Smooth Acceleration Resistor Reduces Radio Frequency Interference (RFI) And Electrode Erosion Limited 2 Year Warranty"