Description 1. The Premium quality sponge connects to debris from entering the barrel, extending media usage time. 2. The pre- sponge roll young fish and shrimp from being sucked into the tank. 3. The pre sponge is Easy to use directly into the inlet basket. 4. The fish tank sponge roll Provides efficient water flow with less clogging for long lasting filtration. Features- Color: Black- Material: Cotton- Size: 8 x 4 x 2. 2cm- Size: 22mm. Package Including 2 x Pre- Sponges