DescriptionThe filter bag can be used for various media, such as phosphate removers, nitrate removers, carbon and remover. It prevents filter mediums from spreading and is made of heavy nylon for better water flow. It is great for bio-balls, activated carbon, ceramic and remover.Features- Color: Black. - Material: Nylon.- Size: Approx. 27x 30 x 0.2cm. - Prevent media from entering your filter system. - Great for bio-balls, activated carbon, ceramic and remover. - Drawstring closure for reusable purpose.