The NGK BR6HIX is an Iridium Spark Plug designed to fit various models of small engines such as those found in lawn mowers, generators, and other outdoor power equipment. It features a fine iridium tip that delivers superior ignitability and longevity compared to standard copper or platinum plugs. The BR6HIX is designed to withstand high heat and extreme operating conditions, making it ideal for use in small engines that are subject to harsh environments.