4" X 4" X 1" Foam Sponge Block Filter Pad For Aquarium Sump Wet-dry
This listing is for one foam block sponge pad. This sponge works great for sumps, canister filters, substrate reactors, or anything else that uses a foam sponge filter. You can cut and shape the foam easily with a razor blade. Measures 4" x 4" x 1"