Used 61.1 sq.ft. horizontal shell & tube heat exchanger, Mfg. by Alabama Heat Exchanger. 316L stainless steel shell rated for 125 psi & FV @ -20 Deg. F/500 Deg. F, 316L stainless steel tubes rated for 125 psi & FV @ -20 Deg. F/500 Deg. F. Shell diameter 8.625'' O.D., 3/4'' Dia. tubes x 6' long. Serial #AHE-696, National Board #377, Year Built: 2001, Previous Service: Condenser, R-901 Jacket - Grignard, Estimated Weight: 1,500#.