Description This aquarium filter is made of premium material for durable and practical to use. It can be used in seawater tank, fresh water tank, aqua-plant tank. And its strong filter ability and high density design can stable water quality and reduce fish died. Features -Color:As Shown-Material:PP-Size:19.00X10.50X10.50cm/7.47X4.13X4.13in-Made of well selected materials,filter sock super toughness and resistance to pressure. - Great fish tank and aquarium filter socks and give the fish a clean environment. - Thefilter sock comes with fine material and highly efficient filtration of impurities in water. - High water penetration efficiency and no water accumulation,filter sock is convenient to use. - These saltwater filters are suitable for freshwater aquariums, saltwater aquariums, fish tanks, ponds, etc. You can also use them to filter the water in your swimming pool . Packing list: 4 x Filter Socks