Champion Iridium Plug Number RC12WMPB4 Spark Plug - 9202 Part #: 9202 Line: CHP Champion Iridium Plug Number RC12WMPB4 Spark Plug 2 Year LIMITED WARRANTY Seat: Gasket Thread Size: M14 Heat Range: 12 Hex Size (in): 5/8 Inch Preset Gap (in): 0.039 Inch Preset Gap (mm): 1mm Center Electrode Tip Material: Iridium Ground Electrode Tip Material: Platinum Service Number: RC12WMPB4 Metallurgy: Iridium/Platinum Show More Show Less