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 also rises. Large water flow, high efficiency, good sealing. Works great for waterer, humidifier, fountain , aquarium, pond, chicken/dog/horse/livestock waterer, etc. The rubber washer ensures a leak-proof and leak-proof kit, and you can adjust the float arm easily. Item Descriptions: Using the float water level principle controls the inlet and outlet water switch, to achieve level effect constant water supply, 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 also rises. Large water flow, high efficiency, good sealing. Works great for waterer, humidifier, fountain , aquarium, pond, chicken/dog/horse/livestock waterer, etc. The rubber washer ensures a leak-proof and leak-proof kit, and you can adjust the float arm easily. Floating ball size: 95 x 50 mm / 3.74 inch x 1.97 inch Working temperature: 0degrees Celsius - 70degrees Celsius Package: 2x 1/2inch Float Ball Valve Item Specifications: Model:DN15 Material:ABS Thread:20mm Apply Pressure:0.01-1.2MPA Flow Direction:Unidirectional Brand :Unbranded/Generic