500 gallon vertical jacketed reactor body. 4' dia. x 5'4" straight side. Welded dished heads. MFD by: Pfaudler, Serial # R160-1387, NB# 16567, with glass 6115. Rated 100 psi internal, 90 psi on jacket. With baffle. Openings: Top - 24" maon opening, 1-6", 1-4", 2-3"; Bottom 1-3" center bottom outlet. Lifting eyes. Mounting lugs.