(2) Shell and tube heat exchanger, manufactured by Louisville Exchanger & Vessel, Inc., all 304L stainless steel contacts. Unit has a total surface area of 164.7 square feet. Unit consists of 151 tubes measuring 1" diameter X 50" long; tubes measure 18 GA (0.049"). Includes six (6) baffles. Unit has a maximum working pressure of 75 PSI @ 350 degrees Fahrenheit, shell side, and 15 PSI @ 350 degrees Fahrenheit, tube side. New in 2009. Previously used as condenser in research facility. Serial number 09010A. Very good condition.