2-Tiers Outdoor Wooden Barrel Waterfall Fountain with PumpCarbonized natural firm wood of the barrels in two different sizes make them smooth and resistant to corrosion and moth damage Powder coated iron of the hoop around the barrels keeps them away from corrosion and rust The barrels are lined with plastic layers to prevent the water leakage The water storage capacity of this fountain set is at least 3 gallons allowing you to keep some shellfish in it Utilizes 120V UL certified pump to circulate water