Behlen Country PR928 9-Foot Diameter Poly Stock Round Tank Nominal size: 9 foot diameter, 1,000-gallon Heavy duty, molded-in aluminum drain fitting and 1-inch poly drain plug ensure a long-life. Fda food-grade approved poly, tested to -20 f,corrosion-free, impact resistant and recyclable. Premium UV Protection assures long life and resistance to color fade in outdoor use. All poly tanks have a three-year warranty.