Used 7000 gallon stainless steel storage tank. Mfg Valley Foundry. Measures 8'3" diameter X 18' straight side. Vessel has cone top with sloped bottom. Top head includes 2" center top opening with 6" flange, 2", 3" & 6" vent. Side includes 13" side port flange, 18" manway with cover. Bottom is a slight sloping bottom leading to 2-1/2" side bottom outlet. past use: storing beverages. (Qty 2 available)