The use of the float water level principle controls the inlet and outlet water switch, to achieve a constant water level effect, keep enough water and always water clean. Floats always in the water, when the water rises, the floats follow the rise. And the rise-driven rod rises too. Large water flow, high efficiency, good sealing. Works great for waterer, humidifier, fountain, aquarium, pond , the chicken/dog/horse/cattle waterer, etc. The rubber washer ensures a leak-proof and leak-proof kit, and you can adjust the float arm easily. Item Descriptions: L using the float water level principle controls the inlet and outlet water switch, to achieve a constant water level effect, keep enough water, and always clean water.Floats always in the water, when the water rises, the floats follow the rise. And the rise-driven rod rises too. Large water flow, high efficiency, good sealing. Works great for waterer, humidifier, fountain, aquarium, pond , the chicken/dog/horse/cattle waterer, etc. The rubber washer ensures a leak-proof and leak-proof kit, and you can adjust the float arm easily. Float ball size: 95 x 50 mm / 3.74 inch x 1.97 inch Working temperature: 0degrees Celsius - 70degrees Celsius Package: 2x 3/4 inch Float Ball Valve Item Specifications: Model:DN20 Material:ABS Thread:25mm Apply pressure:0.01-1.2 MPA Flow direction:Unidirectional Brand:Unbranded/Generic