DC-910900-1.9, Duracast 900 Gallon Heavy Duty Vertical Tank | 910900 These heavy duty vertical tanks are perfect for storing hazardous chemicals and many other corrosive contents. The size and durability of these storage tanks allow you to use them for chemical production, industrial purposes, manufacturing and mining. These tanks are designed for both indoor and outdoor use. The polyethylene resin keeps these tanks standing strong under harsh UV rays. Their low temperature impact strength reduces the chance for cracks in cold weather. Because these tanks are rotationally molded, they turn out to be a seamless and more durable container. This is a 1.9 specific gravity tank.