Size: 10" x 4.7" x 2.75" (2pcs),Suitable thickness makes it easier to cut. Sponge filter provide both mechanical and biological filtration,Trap large bits of waste,And will not get clogged easily. Can be cut to fit your filters.Used for any aquarium or pond filter. Bio Sponge Filter Media Pad is aquatic pet safe and are made without dyes. Suitable for freshwater or marine aquariums Regular cleaning! can be reused after cleaning.it is durable. Filter Foam Sponges, Durable, Bio Sponge Filter Media Pad, Cut-to-Size Foam for Aquarium Fish Tank