Used 200 sq.ft. horizontal shell & tube heat exchanger, Mfg. by Alabama heat Exchanger, type BEM. 316L stainless steel shell rated for 75 psi & FV @ -29/300 Deg C, 316L stainless steel tubes rated for 125 psi & FV @ -29/30 Deg. C, shell diameter 12.75" O.D., 3/4" Dia. tubes x 12' long. Serial #4869, Year Built: 2000, Previous Service Product Still Primary Condenser - Grignard