Spark Plug, Application Marine, Powersports, Hex Size 13/16 in, Thread Size 0.551 in, Thread Reach 0.5 in, Ground Electrode Quantity 1, Ground Electrode Tip Design Standard, Gap Size 0.028 in, Resistor Plug Yes, Hex Size – Metric 20.64 mm, Thread Reach – Metric 12.7 mm, Insulator Material Ceramic, Manufacturer Heat Range 8, Seat Type Flat, Center Electrode Diameter 0.098 in, Ground Electrode Material Nickel Core, Center Electrode Material Nickel