DC-900800-1.9, Duracast 800 Gallon Heavy Duty Vertical Tank | 900800 Keep your chemicals stored safely in these 800 gallon vertical tanks. Like the name implies, these plastic storage tanks are “heavy duty” and can handle just about anything, from harsh environments to destructive liquid contents. These tanks are equipped with a 16-inch vented lid, which means you can quickly fill them without spilling harmful contents. Rotationally molded to be a one-piece storage container, these tanks do not have any weak spots. The polyethylene resin is compounded with UV stabilizers to reduce wear from damaging UV rays. The resin also has the ability to return back to its original shape if ever distorted. This is a 1.9 specific gravity tank.