Description This products is a filter. It can make good water circulation and filter the dirt in the cylinder to keep the water clean, but also the water to bring a large number of oxygen into water, the oxygen will dissolve in the water, add the oxygen content of the water quickly, and maintain a good ecological environment of the aquarium tank. Features - Color: Black. - Material: SEeage. - Size: 12 x 8 x 8 cm. - Easy to install ,only fill up water and plug in and easy to maintain. - High efficiency filtration, waterfall design flow,it has a good filtering,effective filtration of impurities in water, making sure transparent and clear water. - Provides both mechanical and biological filtration, works great without noise - Cylinder wall holder, adjust the distance between the filter and the fish tank. - Suitable for fresh and sealtwater, with biochemical, physical filtration and aeration function. Easy to install ,only fill up water and plug in and easy to maintain. High efficiency filtration, waterfall design flow,it has a good filtering,effective filtration of impurities in water, making sure transparent and clear water. Provides both mechanical and biological filtration, works great without noise Cylinder wall holder, adjust the distance between the filter and the fish tank. Suitable for fresh and sealtwater, with biochemical, physical filtration and aeration function.