Ok but what im saying is most of us are not looking for durability but rather performance, and to tell you the truth Plug wires that are $80+ a set and are 8.8mm Thick have got to be more durable than some $25 4-4.5mm think NGK's, im not saying they're not a good wire but you get what you pay for. I had a set of NGK's before and they fell apart on me. They would kinda melt to the plug then when I would try to remove them the wire would pull right out of the metal part then right out of the boot, leaving the wire in my hand with the boot on the plug.
I mean really how can a plug wire thats thiner be "more" durable than a plug wire thats 50% thicker?
This is right off the website, (I wish I still had the box so I could just type out what it said on the box).
"8.8mm black silicone jacket with aramid core and fiberglass braiding. Terminal ends are high-conductivity brass with silicone boots. Eliminates electrical leakage; provides excellent performance in high-temperature applications"
If I find my box I'll give some detail stuff on what Acell's 8.8mm plug wires have that make them so great. But what I posted above is enough to show that they are far more durable and higher performance than NGK's.