DC-910500-1.9, Duracast 500 Gallon Heavy Duty Vertical Tank | 910500 Featuring outstanding strength and durability, these heavy duty vertical tanks are your No. 1 storage solution for a variety of hazardous contents. People can use these storage tanks to hold industrial and agricultural chemicals, many kinds of acids, liquid fertilizers and liquid feed. The polyethylene resin is UV stabilized to extend the life of these tanks and slow down the process of sun damage. Their low temperature impact strength keeps these tanks from cracking in cold weather. Rotationally molded, these tanks are a one-piece structure with no joints, seams or welds to allow leaks. A 16-inch vented lid provides easy access for cleaning and filling tanks. Gallon calibrations are molded into tanks to measure content levels. This is a 1.9 specific gravity tank.