ITEM NAME:1PC Mini Float Ball Valve 1/2 Inch Fish Tank Aquarium Water Humidifier Valv FT Features: 1. Automatic float valve, based on a new technology platform and completely overcome the many traditional shortcomings. 2. Floats always be floating in the water, when the water rise, floats followed the rise.And rod driven by rising also rise. 3. Connected to the rod and the valve, when up to a certain position, close water. 4. Non-toxic, tasteless. 5. Water flow is big, high efficiency. 6. Easy to install and flexible adjustment, can be installed at any angle. 7. Suitable for corrosion, chemical, medical, household, aquarium and so on. Specification:.Floats always be floating in the water, when the water rise, floats followed the rise.And rod driven by rising also rise. Connected to the rod and the valve, when up to a certain position, close water.