Four Cylinder Copper Core Spark Plug Wire Kit. This is a great, economical kit. Includes a minimum 15′ of Copper Core Wire and all the ends. You will have wire left over for other projects. If you are running those radio suppression wires on your tractor, eventually, if not now, they will cause poor performance. They break down with time & weather. Very important, Radio Suppression wires WILL shorten the life of a magneto!