Used 150 liter (39 Gal)Precision Reactor, 316L stainless steel construction, approximately 20" diameter x 36" straight side, hinged dish top, dish bottom, rated 40 PSI and full vacuum at 300 F internal, 304L stainless steel jacket rated 60 PSI at 300 F, on legs, Serial# 5822-1, National Board# 4102, built 1992.