Champion Iridium Plug Number REA12WMB4 Spark Plug - 9110 Part #: 9110 Line: CHP Champion Iridium Plug Number REA12WMB4 Spark Plug 7 Year Limited Warranty Seat: Gasket Heat Range: 12 Hex Size (mm): 14mm Hex Size (in): 9/16 Inch Preset Gap (in): 0.041 Inch Preset Gap (mm): 1.05mm Thread Reach (in): 1.043 Inch Center Electrode Tip Material: Iridium Insulator Height (in): 0.120 Inch Ground Electrode Tip Material: Platinum Thread Reach (mm): 12mm Service Number: REA12WMB4 Metallurgy: Iridium/Platinum Show More Show Less