This Brass Spark Plug Finial is a wonderful addition to Unstyled Two Cylinder Tractors and 1 cylinder Hit-N-Miss engines. It acts to modify your current spark plug to look more like the original spark plug design of the 1930's. To install, simply remove the threaded wire clip used to hold the spark plug wire in place, then place the spark plug finial over the top threads of the spark plug. This spark plug finial will remind viewers that your attention to details is uncompromised. Use with our threaded thumb nut or Spring Clip wire retainers.