DC-901650-1.9, Duracast 1650 Gallon Heavy Duty Vertical Tank | 901650 When you need a reliable storage container, rely on none other than Duracast’s heavy duty vertical tanks. These dependable storage tanks have a high resistance to chemical attack and can also combat external forces as well. These tanks have outstanding low temperature impact strength which reduces the possibility of cracks caused by extremely low temperatures. Their ability to handle aggressive contents like industrial and agricultural chemicals makes these tanks the perfect vessel for chemical production. Other common contents people use these tanks to store include biodiesel, DEF, vegetable oils, liquid fertilizer, liquid feed and many different kinds of acids. To make calculating content levels a breeze, these tanks are equipped with gallon calibrations molded into the plastic. This is a 1.9 specific gravity tank.