Ultra Quiet Submersible Filter: Aquarium Sponge Filter is air-powered and ultra-quiet, providing efficient filtration without disturbing your fish; Water Circulation: Narrow inlet grille effectively blocks large dirt, prevents blockage formation, and maintains smooth water circulation Multi-functional Aquarium Filter: The fish tank sponge filter combines filtration, aeration and water circulation in one, helping to keep your fish tank crystal clean and provide an excellent living environment for your aquarium inhabitants. Wide Application: sponge filter can work great in breeding fry tank, shrimp and fish tank, freshwater and marine tank. Colour:As Shown Material:plastic Size:L Package Contents: 1 x fish tank filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.