This is a set of 4 Champion Copper Plus Spark Plug 854 RH10C. The spark plugs are designed for electrical systems in cars and trucks. They come with a 1-year manufacturer warranty and are authorized dealer products. Made of copper, the spark plugs are 3.9 inches long. They are eligible for free shipping within the contiguous US and can be shipped globally through eBay's program. Be aware of legal disclaimers and California Prop 65 warnings.