Rcexl ICM-6 Iridium Spark Plug
Note that the manufacturer indicates a normal spark plug gap for this unit to be .4 to .5mm or .016 to .020 inches.
The melting point of iridium is 2450 °C, platinum is 1770 °C, and nickel is 1453 °C.
The higher melting point of iridium and platinum allows spark plug manufacturers to reduce the diameter of the center electrode. The smaller the diameter of the center electrode, the lower the voltage needed to start the spark. The finer point means that the electrode can absorb heat easier and faster, leading to improved acceleration, fuel consumption and smoother idling.
If you decide to double-check the gap you should use a wire-style gapping tool. We do not recommend using the ‘coin’ style gapping tool because it can damage the fine wire tip.”