Disposal Design: It is easy to seal the mesh bag. Simply pull to tie the opening and tie a slip knot. For aquarium filtration: Place the mesh bag filled with filter media into the aquarium, which will make it clearer and free from impurities. High Quality Filter Bag: Made of high quality nylon, the double slotted filter bag is sturdy and durable. They can be used repeatedly without breaking easily. Fine Mesh: Filter bags are suitable for holding larger media items, such as granular carbon, bioceramic rings, biospheres, zeolites, lava and graves Versatile: The filter bag is also very suitable for filtering coffee, milk and soy juice, or for storing fruits, vegetables, beans, rice and other items.Delivery quantity: 10 pieces (10 black)