' Hockey puck' caps 30kv, about 2 5/8" x 1 1/2" size . Using on a 7500/60 neon right now, may move up to 9000/60. How much abuse can these take ? I'm guessing heat is a concern. Working well on small coil now. Short runs . Maybe someone here has used them and can comment. 4000MMFD is equal to .004 mfd. ? Thanks, Dave _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla