DC-903000-1.9, Duracast 3000 Gallon Heavy Duty Vertical Tank | 903000 Use Duracast’s heavy duty vertical tanks when you need maximum strength and durability. These above-ground storage tanks can hold contents up to 1.9 specific gravity, which means you can use these tanks to hold a wide range of contents. Common contents people use these tanks to store include agricultural and industrial chemicals, liquid feed, liquid fertilizer, biodiesel and vegetable oils. Impact-resistant, these tanks can withstand environmental stress very well. The UV-stabilized resin slows down the overall wearing process caused by harsh UV rays. Their low temperature impact strength helps to prevent cracks in cold weather. These tanks are equipped with a 16-inch vented lid and gallon calibrations molded into the tanks. The large lid provides enough room for you to clean tanks before you refill them. The gallon indicators make it easy for you to measure content levels. This is a 1.9 specific gravity tank.