Description: 【Efficient Filtration】: Fish Tank Filter Sponge is designed to particles and debris efficiently, extending the life of your filter media and ensuring a cleaner aquarium environment. 【Easy Installation】: This filter sponge can be quickly and easily attached to the fish tank intake tube stem, providing an uncomplicated solution to maintain your aquarium. 【Debris Prevention】: Our Aquarium Pre Filter prevents small or weaker debris from being drawn into the filter, protecting your fish and enhancing the overall health of the tank. 【Quality Material】: Made from quality material, our filter sponge is safe for your fish and suitable for both freshwater and saltwater environments. 【Prolonged Use】: Our Aquarium Filter Sponge is sturdy and built to last, providing efficient water flow with less clogging for extended periods. Size Chart: (diameter*height)6.5cmx7cm/2.56inchx2.76inch Package Includes: 1 Fish Tank Filter Sponge(4 Pack) Note: Please allow slightly errors 1-2cm differences due to manual measurement.