Place the Granite Rock Bubbler in any bird bath with at least an inch and a half of water, and watch the water bubble out the top. This moving water is sure to attract the attention of birds flying overhead, and will draw them to your bird bath over your neighbor"s any time. An included 120 GPH pump keeps things moving. This bubbler is constructed of fiberglass so it"s extremely durable and weather"s just fine. * Water bubbles from the top of this realistic rock * Moving water is sure to attract the birds * Fiberglass material weathers beautifully * Features a hidden water pump for a natural look * To be used in baths with at least 1.5-inches of water * Includes a 120 GPH pump * Dimensions: 6L x 6W x 4H inches * Color varies like natural rock