Threlaco 18 Pcs Compatible with Fluval 206/207 Aquarium Filters Sponge Set, Including Foam Pad, Water Polishing Pad, Foam Max, for Replacement Filter MediaBrand: Threlaco Color: blue Features: Package Content: the package contains 18 biological sponges, compatible with fluval 206 207, including 6 water polishing pads, 4 plain sponges, 4 biological sponges, and 4 foam max. It's providing ideal filtration performance and efficient water flow, achieving long lasting filtration, bringing you a good user experience Ideal and Long lasting Filtration: these replacement media for aquarium filters will provide