Representative Image NGK Copper Plug Number CPR8E Spark Plug - 7411 Part #: 7411 Line: NGK NGK Copper Plug Number CPR8E Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M10-1.0 Heat Range: 8 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.024 Inch Preset Gap (mm): 0.6mm 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: CPR8E Metallurgy: Copper Show More Show Less