VANKERR CO. CHICAGO VKCO TRANSFORMER SPARK PLUG MOUNTED INTENSIFIER This intensifier is made of Brass and Fiber material, about 1-5/8 inches long. These devices were mounted on the spark plug to create a hotter spark. Sold without reserve and with satisfaction guaranteed. Winning bidder pays $1.50 shipping, international buyers pay actual shipping cost. If you have questions please e-mail us before the auction ends. To view our other eBay items click ! Thanks for looking!