Used 150 gallon Walker Kettle/Tank, Model PZ-K-SP, 316 stainless steel construction, approximately " diameter x " straight side, dish top, cone bottom, rated 10 psi and full vacuum at 250 F. internal, jacketed for 75 PSI at 250 F. (provision for top mounted agitator drive). Unit mounted on legs, Serial# 767, National Board# 489, built 1979.