Used 56 Sq ft Doyle and Roth 304 Stainless Steel Horizontal Shell and Tube Heat Exchanger. Shell and (18) .75"OD x 16' L tubes rated 560PSI/FV @ 350 F. Approximately 23" OAH x 212" OAL. Weight 1,450 lbs. Serial #S2771-1. National Board #21587. Buit 2015.