The set contains 12 matching serial numbered $20s from the 12 Federal Reserve banks. Below is a link to a better description from an ebay auction. The seller is asking $800 for a higher numbered (and, therefore, less valuable) set than mine. I'll take $660, including shipping. Email me if interested. There are at least 4 c&s collectors that I would trade the set for only 2 chips. Sounds like a bargain to me.

http://cgi.ebay.com/20-Premium-Federal-Reserve-Set-1996-457-2000-/270603877343?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item3f013f7bdf