What design features make the Iridium Power stand out from competitors?

Iridium is 6x harder and 8x stronger than platinum, this allows DENSO engineers to shrink the center electrode tip to only 0.4mm, the world’s smallest , and still maintain durability. This tiny electrode reduces the required voltage for the plug to fire resulting in improved firing performance. DENSO uses a patented Iridium alloy formula which employs over 90% Iridium, and small amounts of another material called Rhodium, which is added to even further reduce oxidation.