ACDelco MR43T Specialty Marine Spark Plug (Pack of 1)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Copper Core. The thermal properties of copper provide great heat transfer and increases plug durability</li><li>Ribbed Suppressor Seal， which extends resistance and prevents spark ‘flash over’ and misfire</li><li>Nickel-chrome alloy sheathing to help prevent corrosion on center electrode</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41edR6s1pPL.jpg" noproxy>