Used approximately 50 gallon T304L stainless steel reactor. 50 psi @ 400 degrees F Min Design Metal Temp -20 degrees F. Jacket rated 100 psig @ 400 degrees F. Min Design Metal Temp -20 degrees F. 30" head dish radius. Shell 16 gauge. 1/3 HP Ultramix Vektor Lightning top mounted mixer. Built by Precision Stainless, 1993. S/N: 6091-3. On Four legs.