Package includes 10 pack TOPZEA 3D honeycomb aquarium filter socks, size: 4 inch(W) x 9.8 inch(L)/ 10 cm x 25 cm, well made and do a great job of filtration, the quantity is sufficient for daily use and replacement, great used in sump, overflow. The 3D honeycomb filter socks are made of 3D woven mesh, durable, thick, have high density and good penetrability, the structure can effectively catch dirt in fish tank at the same time will not clog, the collect way is better than the plain mesh type. The aquarium filter bags with honeycomb design can catch and hold a lot of big particles, but don't clog up easily, such as poop, rock, eaten food or other debris, water flows through excellent and traps. A must have aquarium filter accessories. The aquarium filter socks are suitable for saltwater/ freshwater aquarium, fish tank, pond and more, improve water quality and keep the water environment clean, friendly to aquatic life, it is ideal gifts for fish hobbyist