NGK Copper Plug Number MAR10A-J Spark Plug - 4706 Part #: 4706 Line: NGK NGK Copper Plug Number MAR10A-J Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M10-1.0 Heat Range: 10 Hex Size (mm): 14mm Preset Gap (in): 0.032 Inch Preset Gap (mm): 0.8mm Thread Reach (in): 0.750 Inch Center Electrode Core Material: Copper Center Electrode Tip Material: Nickel Approximate Resistor Value (Ohm): 5000 Ohm Insulator Height (mm): 51mm Insulator Height (in): 2.010 Inch Thread Reach (mm): 19mm Service Number: MAR10A-J Metallurgy: Copper Show More Show Less