BAZHOU High QualityOur biochemical sponge filter is made from high quality plastic material, which is sturdy and durable. Keep Water Clear and CleanThe fish tank sponge filter adopts biochemical cotton, cultivating nitrifying bacteria, multi-layer design, with a large amount of surface area to filter impurities. Make water quality clearer. With Suction CupThe fish tank sponge filter with powerful suction cup, durable and beautiful, easy to clean and install. Multi-layer DesignMultiple filtering, the bottom of the fish tank sponge filter is a layer of biochemical sponge, the medium is air stone, then covered with funnel outlet, better filtering effect . Delivery Quantity: 2pcs Package Contents: Only the above package contents, excluding other products. Size: 3x3x9.8cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: White (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)