Feature:1. Switch valve, outlet valve design, can freely control of water volume.2. Suitable for large and medium size fish tank.3. Unique tube design, unique water pressure design, holding the tube under the shaking, the water can be pumped out.4. The filter mesh can quickly filter impurities in water and wash sand easily.5. The hose made of PVC material, eco-friendly, non-toxic, high elasticity.Spec: Item type: Fish Tank Water Change Tool Condition: 100% brand new Material: ABS + PVCColor: As picture shownInstruction: First of all, put the suction head of the water changer into the fish tank, preferably into the water.Secondly, keep moving the suction head upand down until the water pressure in the tube causes a siphon effect.Finally, under the action of the siphon effect, the water naturally flows from the aquarium through the water pipe to the outside bucket, and there is no need to shake the water changer tip up and down.Package List:1 x Pipe body1 x Extend pipe1 x Filter mesh1 x Hose