NGK Copper Plug Number CPR6EB-9 Spark Plug - 5958 Part #: 5958 Line: NGK NGK Copper Plug Number CPR6EB-9 Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M10-1.0 Heat Range: 6 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.036 Inch Preset Gap (mm): 0.9mm 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): 50.8mm Insulator Height (in): 2 Inch Thread Reach (mm): 19mm Service Number: CPR6EB-9 Metallurgy: Copper Show More Show Less