Used- Yula 2 Pass Shell & Tube Heat Exchanger, 58 Square Feet, Model WC-2D-120BS, 316L Stainless Steel, Horizontal. 316L Stainless steel shell rated 100 psi at 40 to 500 degrees F. (36) 3/4" diameter x 120" long 316L stainless steel tubes rated 150 psi at 40 to 250 degrees F. 316L Stainless steel tubesheet and head. Openings for tubes (2) 2", openings for shell 4", 1-1/2". National Board# 13463, serial# 21484, built 2012.