20.7 sq. ft. vertical graphite cylindrical block heat exchanger. MFD by Carbone, model # 1210-25, Serial# 10801, NB# 1072, built 1997. ASME code stamped for 215 psi @ 350/-20 deg. F on shell side, 100 psi & FV @ 350/-20 deg. F on tube side. Shell 18" OD x 29 5/16" long. Openings: Head - 1-2"; head 1-2"; shell 2-1.5". Lugs for mounting.