Description _x000D_ _x000D_ This products is a filter. It can make good water circulation and filter the dirt in the cylinder to keep the water clean, also the water to bring a large number of into water, the will dissolve in the water, add the content of the water quickly, and maintain a good ecological environment of the aquarium tank. _x000D_ _x000D_ Features _x000D_ _x000D_ - Color: Black. _x000D_ - Material: Sponge. _x000D_ - Size: 12.00X5.00X5.00cm;/4.72X1.97X1.97in; _x000D_ - Easy to install ,only fill up water and in and easy to maintain. _x000D_ - High efficiency filtration, waterfall design flow,it has a good filtering,effective filtration of impurities in water, making sure transparent and clear water. _x000D_ - Provides both mechanical and biological filtration, works great without noise _x000D_ - Cylinder wall holder, adjust the distance between the filter and the fish tank. _x000D_ - Suitable for fresh and sealtwater, with biochemical, physical filtration and aeration function. 1 x Aquarium Sponge Filter _x000D_