Used- Yula U Tube Heat Exchanger, 486 Square Feet, Model CV-4L-120CS, Horizontal. Carbon steel shell rated 150 psi at -20 to 550 degrees F. (94) 1" Diameter x 120" long carbon steel tubes rated 150 psi at 20 to 550 degrees F. Carbon steel head, and tube sheet. Openings head (2) 8", shell 4", 8". Mounted on saddles. Serial# 15024 more info...