Used approximately 90 gallon vertical stainless steel tank. Approximately 30" diameter X 30" straight side. T304L stainless steel. Internal rated 15 PSI/FV at 248 degrees F. Built by Precision Stainless. 1993. SN 6072-25. Top mounted off center Chemineer drive model 2BTNS-3 (requires motor). Vessel has dished top and bottom heads. Center bottom outlet. Mounted on 4 legs with castors.