Tesla stuff for sale

I've been looking at the .01uF, 80kV cap that was mentioned in the list
of stuff for sale, and it looks about right for my installation. What I
want to know is, how big is it, and is it a pulse discharge cap? If the
seller or anyone else could clarify this, I'd really appreciate it.

P.S. I'm still looking for a transformer design program, so if you know
of one, or a source for blocks of ferrite, please tell me!

            --Doug Brunner