I used 19 strand Beadalon wire, which I buy at a craft store. The wire I used is a little light for pike. I think most guys prefer a heavier guage wire for bite protection. There is also a small articulate shank attached to the rear hook. I just picked up articulated flies this season. They are fun to tie. Once you get the hang of it, you can tie them pretty quick.
....And, by the way, I don't pike fish. This is actually a fly that my buddy turned me on to for trout. Look up Rich Strolis on vimeo. He has over 100 videos, and quite a few are articulated patterns, some of which are specifically designed for pike. He is a great tier, and most of his patterns are pretty easy to tie.