Top Fin SF20 Sponge Filter

This Top Fin SF20 sponge filter is designed for aquariums up to 20 gallons. It includes a filter media sponge, air stone, and clear riser tube. The dimensions are approximately 2.95" x 2.95" x 6.24" (7.4 cm x 7.4 cm x 15.8 cm). It's a useful tool for maintaining water quality in a fish tank.