DC-901500-1.9, Duracast 1500 Gallon Heavy Duty Vertical Tank | 901500 These vertical storage tanks are rotationally molded and manufactured to provide long-lasting storage capabilities. People can use these tanks for numerous purposes, including chemical production, construction, farming and manufacturing. Whether they are kept outdoors or indoors, these vertical storage tanks will stand up strong. These tanks are designed to handle harsh weather environments such as extremely low temperatures. The UV-stabilized resin slows down any damaging effects that the sun typically has on plastic containers. The polyethylene resin is also FDA approved, which means you can use the tanks to store liquid feed or potable water. Available colors include natural white, green and black. The natural white color of the polyethylene is translucent. Black and green options are best for slowing down algae growth. This is a 1.9 specific gravity tank.