Used Lee Industries 20 Gallon / 75 Liter stainless steel jacketed reactor body. Internal rated 50 psi /FV @ 300 degrees F. Jacket rated 60 psi @ 300 degrees F. Bolted dished top. Dished bottom. Sanitary. Polished. On wheels. Model 20U, Serial # B33180. NB 4382. Built 1989.