Unused 2589 sq. ft. Horizontal U-tube Heat Exchanger. Mfr Ohmstede Ltd. Carbon steel shell rated 1080 psi @ 570°F. (480) 1" diameter X 11' long 321 stainless steel tubes rated 866 psi @ 645°F. Size 49-132, type AEU. National Board #3704. Serial #748954. Built 2010.