This item is a fish tank filter, made of excellent material, very sturdy and durable to use. This product is suitable for many occasions, the size is fit for most fish tanks. Suitable for fish tank and aquarium, and bring much convenience to you. Made of selected material, it doesn’t interfere with your fish tank's other accessories. Features -Color:Black -Material:Sponge - Size: 13.00X12.30X4.10cm/5.11X4.83X1.61in - High density design, not easy to damage. The material of the filter sponge will not be crushed to achieve the filtering effect and smooth water. - Suitable for sea water tank, fresh water tank, water tank, fish tank, tank bottom tank or drip filter aquarium. Regular cleaning, after cleaning can be reused. - You can easily cut this filter sponge pad as needed. Choose the right size for your filtration system. Give you more convenience to filter. - It's easy to clean. Effectively avoid residues, reduce fish mortality and chemical filtration, increase oxygen solubility in aquariums and fish tanks. - Use this filter sponge in the fish tank to get the and bring a clean environment to your fish. You can use it with confidence. Package list: 1 x filter pad