DC-906000-1.9, Duracast 6000 Gallon Heavy Duty Vertical Tank | 906000 These heavy duty tanks are perfect for storing corrosive chemicals and many other damaging contents. People commonly use these tanks for manufacturing and industrial purposes, chemical production and commercial food processing. These tanks can handle both outdoor and indoor environments. Because these tanks have superior mechanical properties and are impact-resistant, they will not crack easily under environmental stress. The polyethylene resin is compounded with UV stabilizers for added durability and protection. Gallon calibrations are molded into the tanks so that you can quickly view content levels. A 16-inch vented lid provides access for filling and cleaning these tanks. This is a 1.9 specific gravity tank.