Used 153 sq. ft. 316 STAINLESS STEEL SHELL and TUBE HEAT EXCHANGER. Shell and tubes rated for 150 psi @ 300 deg. F. 13 inch diameter shell x 6 ft. Overall: 16.5 inch OD x 96 inch long. (130) 3/4 inch OD tubes, 5/8 inch ID. Inlets and outlets: 3 inch and 3/4 inch on one head: 3 inch, 1 inch, and 3/4 inch on other head. Shell has (2) 2 inch and (2) 3/4 inch fittings Mfg by Ketema, S/N: U891801A, NB# 448, built 1989. UNIT HAS BEEN PRESSURE TESTED.