DescriptionThe products are made of corrosion-resistant materials, you clean them easily. When using them, you put the filter material into the mesh bags and then put them into the filter tank or filter bucket. When replacing or cleaning the filter material, you should remove the filter bags directly.Features- Color: White, black. - Material: polyester - Size: 20x15x0.2cm/7.87x5.9x0.07inch - Made of corrosion-resistant materials, durable and reusable - The bag opening is equipped with high-quality zippers, convenient for cleaning and maintenance - Has good water permeability and is not easy to block You store the biosphere, activated carbon, volcanic and other filtering materials into them - Suitable for fish tank and aquarium etc.