Features: 1.[Multipurpose] Aquarium sponge filter solves the problems of frequent water changes, mixed water, yellow turning green and fish dying. 2.[Multiple Layer Design] The fish tank sponge filter adopts multi layer design with large surface area, which will not obstruct the water flow. 3.[Generate Bubbles] Air diffusion stone of the fish tank filter will generate a large number of bubbles to increase the solubility of oxygen in the water. 4.[No Noise] Aquarium internal sponge filter will not make any noise during operation. Suitable for most small freshwater fish tanks. 5.[Premium Material] Fish tank aerodynamic sponge filter is made of premium plastic and sponge material, safe, non toxic and durable. Specification: Item Type: Sponge Aquarium Filter Material: Plastic, Sponge Product Size: Approx. 16 x 13cm / 6.3 x 5.1in Sponge Size: Approx. 9.5 x 4.5cm / 3.7 x 1.8in Telescopic Tube Adjustable Length: Approx. 15-25cm / 5.9-9.8in PackageList: 1 xSponge Aquarium Filter 1 x Air Hose 1 x Outlet Pipe 4 x Suction Cup 1 x Air Hose Valve Note Manual measurement, please allow some errors.