One used 500 liter Precision Stainless reactor, 316 stainless steel construction with Lightnin mixer. Approximately 36″ diameter x 36″ straight side, dish top and bottom. Rated 45 psi and full vacuum at 350 f internal, jacketed for 100 psi at 350 f. Top entering off set Agitator drive, .33 hp, 90 volt dc motor, serial# 6818-2. National board# 4955, built 1993.