Used 25 sq.ft. horizontal shell & tube heat exchanger, Mfg. by Alabama Heat Exchanger, type BEM. 316L stainless steel shell rated for 75 psi & FV @ 572 Deg. F., 316L stainless steel tubes rated for 125 psi & FV @ 572 Deg. F., Shell diameter 6.625" O.D., 3/4 Dia. tubes x 8' long. Serial #AHE-687, Year Built: 2000, Previous Service: Product Still Secondary Condenser - Grignard - Estimated Weight 600#.