32 sq. foot nickel 200 tubes, tube sheets, heads, steel shell horizontal heat exchanger. Mfg by Hebler, type BEM size 12 x 24, built 1997. ASME code stamped for 200 PSI & FV @-20/+ 400 degrees F on shell and tube side. Shell 12.75" OD x 24" long. Overall exchanger's length 72". Single pass on both sides. 64 nickel tubes at 1.25" triangular pitch. Openings: Head 1-1", 1-8", head 1-2", 1-8". Shell 1-8" 1-2" at 180 degrees opposite sides.