3x8 flat pan evaporator with draw off valve, arch itself is made out of 2 oil barrels. This is a big , batch evaporator. I saw this boil it worked pretty well. Did between 25-30 gallons per hour. Listing for a friend. Please Call Don at 1-207-890-3680. Good way to get boiling alot of sap for short money this year. Best reasonable offer.