DC-900850-1.9, Duracast 850 Gallon Heavy Duty Vertical Tank | 900850 Rely on a storage tank that you can actually trust and use Duracast’s heavy duty vertical storage tanks. These above-ground tanks are manufactured to meet today’s tough storage requirements and are able to combat many damaging forces. To meet your storage needs in outdoor environments, these tanks are made of UV-stabilized resin and will not wear down quickly from harsh ultraviolet rays. The low impact strength that these tanks have means they will stand up well in extremely low temperatures. Able to withstand a broad PH range, you can use these tanks to hold a variety of aggressive contents, ranging from hazardous chemicals to many acidic liquids. This is a 1.9 specific gravity tank.