Behlen Country Steel Stock Tank Round Approximately 340 Gallon! Behlen Country Steel Stock Tank 50130148 Round Approximately 340 Gallon. Ideal for all your livestock watering needs. Built to endure the most severe farm and ranch conditions. Corrosion resistant, heavy zinc coating assures long life. Rigid sidewalls have both ribs and corrugations for maximum strength. Heavy galvanized tank bottoms 20 ga. Heavy, reinforced steel tube rolled into the top lip for added strength and durability. The drain plug is located 1-1/2 from the bottom of the tank and sits off center 3 to 4 inches depending on the size of the tank. Notes : Tank sizes are nominal and will be slightly less than stated size. Requiring the inner tanks to be undersized.