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 stainless steel for better water flow. It is great for bio-balls, activated carbon, ceramic and remover.Features- Color: Silver. - Material: Stainless steel- Size: Approx. 8.5x 3 x 3cm. - Prevent media from entering your filter system. - Great for bio-balls, activated carbon, ceramic and remover. - Good choice for your fish tank percolator.