DC-900500-1.5, Duracast 500 Gallon Plastic Storage Tank | 900500 For unbeatable strength and storage capabilities, get Duracast’s vertical plastic tanks. These above-ground tanks provide high quality performance for years of worry-free storage. The resilient polyethylene has the ability to return back to its original, cylindrical shape after being severely distorted. The UV stabilizers that are compounded into the resin make these tanks UV resistant. The overall strength that these tanks have makes them highly resistant to adverse conditions, such as harsh weather environments or constant handling. These tanks are also able to fight against hazardous contents, which is why many people use these tanks to store harmful chemicals. These tanks are equipped with a 16-inch vented lid and gallon indicators that are molded into the tank. This is a 1.5 specific gravity tank.