Features: 1.No need for electric float to supplement water. Instead, use atmospheric pressure or water pressure to refill water. 2.Free ascent and descent controlling water level, lifting design for determining the water level you want. 3.Through the principle of tap water pressure, pump pressure and water ball valve limit, the water body of the water tank or domestic tap water can be easily introduced into the water tank. 4.Save time and energy to automatically fill water, do not worry about the changes in fish tank water level. 5.Hands free and automatic limit for water supplement, the height can be freely adjusted within 15cm(5.9in). Specification: Item Type: Auto Water Filler Material: Plastic Color: As Pictures Shown Product Size: Float Ball Size: Approx. 82x40 mm/3.2x1.6 in Weight: Approx. 261g Suitable for Pet Type: Water grass tank, sea water tank, seafood tank, water storage tank PackageList: 1 x Float Ball Valve1 x PE Pipe2 x Brackets4 x Screws Note： 1. The water refiller is just a switch (The water source can be connected with the water pipe, which requires adaptor, RO machine and water refill bucket). The water refill device use atmospheric pressure or water pressure to refill water, and no additional water pump is needed. When the water tank is short of water, float ball droop is equal to switch on, fill water (refill water). When the water supplement reaches the set height, the float ball floats, which means the switch is off. The water refill devices are all 2?part PE tubes, so the choice of docking part is very important, so it may not be able to be used if bought separately. 2. Please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.