Description: The aquarium internal filter is made of high quality plastic which is safe, odorless, non-toxic, environmental and durable. Combined with the air pump, to achieve the dual effect of oxygen and filtration. This product has a multi-layer principle of design and manufacture, with the largest surface area, and there is no obstruction to the water. This filter does not have any noise during operation and will bring you a quiet environment. Its dispersed gas can produce large amounts of bubbles, increasing the solubility of oxygen in water. Especially for feeding colorful gods, gods and other small freshwater fish. Such a wonderful goods, just bring it home! Features: 1. Made of high quality plastic material which is safe, odorless, non-toxic, environmental and durable. 2. Combined with the air pump, to achieve the dual effect of oxygen and filtration. 3. This product has a multi-layer principle of design and manufacture, with the largest surface area, and there is no obstruction to the water. 4. This filter does not have any noise during operation and will bring you a quiet environment. 5. Its dispersed gas can produce large amounts of bubbles, increasing the solubility of oxygen in water. 6. Especially for feeding colorful gods, gods and other small freshwater fish. Specification: Condition: 100% Brand New Item Type: Aquarium Internal Filter Material: Plastic + Sponge Color: Black Optional Type: Single Head Filter, Double Head Filter Single Head Filter Size: Approx. 9 * 14cm / 3.5 * 5.5inch Double Head Filter Size: Approx. 14 * 14cm / 5.5 * 5.5inch Package Weight: Approx. 60~85g Package Included: 1 x Aquarium Internal Filter With Suction Cup Only Note: 1. Before use, soak with aquarium water for 5 minutes, will be easy to nitrify bacteria to form colonies. 2. Rinse the sponge must use aquarium water, do not use hot water.