Brand XINYOU Model XJ-280 Quantity 1 piece(s) per pack Color Black + write Material Cotton + plastic Specification Suitable for fish tank is less than 280L Other Features Before use soak the Bio-foam in aquarium water for 5 mins; Rinsing only with tank water and avoid tap water and warm water; When the re-use of biological sponge to remove the air of sponge by squeezing in the water which would allow the sponge to keep submerged in Bottom; Suggested replacing the bio-foam every 6 months to ensure the filtering effect as well as the growth of the nitrifying bacteria. Packing List 1 x Sponge filter 1 x Plastic pipe