Total Size:12 x 11cm/ 4.7 x 4.3 inch(D*H)Material:SpongeProduct Name:Aquarium Filter SpongeNet Weight:28gCenter Hole Dia:28mm/ 1.1inchBiochemical Sponge Filter provides both mechanical and biological filtration.Simply install an airline into the unit and provide both aeration and filtration for your fish.In addition, the Cylinder Aquarium Filter traps waste particles mechanically cleaning the water without trapping the baby fish.The Fish Tank Sponge Filter featuring a weighted plastic base that keeps the unit from floating during use, and cylinder design to eliminate dead Lift tube allows the use of power head without adapter, increasing its versatility.Easy to clean, simply rinse and squeeze sponge under water.Color:BlackPackage Content:1 x Aquarium Filter Spongespace between the filterNote: Light 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.