The Sai Coil Building Kit comes with everything you need to build six of your own coils, except for the wires. The kit comes with six (6) of each: coil housings, threaded caps, ceramic cups, quartz rods, pins, gaskets, and wire sleeves. Coil building is an advanced procedure for do-it-yourself enthusiasts. If you don't already know how to do it, please do not purchase this kit!