NGK Copper Plug Number DPR7EA-9 Spark Plug - 5129 Part #: 5129 Line: NGK NGK Copper Plug Number DPR7EA-9 Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M12-1.25 Heat Range: 7 Hex Size (mm): 18mm 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): 50mm Insulator Height (in): 1.970 Inch Thread Reach (mm): 19mm Service Number: DPR7EA-9 Metallurgy: Copper Show More Show Less