Used- Yula 6 Pass Shell & Tube Heat Exchanger, 196 Square Feet, Model WC-6F-120BS, 304L Stainless Steel, Horizontal. 304L Stainless steel shell rated 80 psi at 40 to 250 degrees F. (102) 3/4" diameter x 120" long 304L stainless steel tubes rated 120 psi at 40 to 250 degrees F. 304L Stainless steel tubesheet, carbon steel heads. Openings for tubes (2) 3", openings for shell 6", 2". National Board# 12655, serial# 20273, built 2007.