Used 40 gallon Holloway Reactor, 316L stainless steel construction, approximately 26" diameter x 18" straight side, dish top and bottom, rated 30 PSI and full vacuum at 250 F internal, jacketed for 100 PSI and full vacuum at 250 f, top mounted .5 HP Ex-Proof agitator drive, Serial# MT6003-10020, National Board# 948, built 2006.