The product is a 2001 $1 Federal Reserve Note with a special serial number C18112191E. This note is considered unique as it is one of only five in existence with this specific serial number. The note is circulated, denominated at $1, and falls under the category of Federal Reserve Notes in the realm of paper money. With a certification of uncertified, this 2001 $1 Federal Reserve Note is a rare and collectible piece for those interested in US coins and paper money.