One used 250 liter Walker reactor, 316L stainless steel construction, hinged dish top, dish bottom, rated 45 psi and full vacuum at 300 f internal, jacketed for 150 psi and full vacuum at 300 f, bottom mounted .5 hp magnetic agitator drive, 90 volt DC, on legs, serial# SPG-12702-3, national board# 4178, built 1999.