Package includes: You will receive 3 pieces of 180μm aquarium media bags with drawstring, each size is 9 x 19 cm/3.5 x 7.5 inch, great for small tanks and ponds. Premium Material: Made from food-grade nylon mesh, these fine mesh bags feature sturdy construction and heavy-duty stitching, strong and durable, allowing for multiple washes and reuses. Practical Drawstring: The drawstring net bag seals tightly to prevent loose media from potentially damaging the pump or being inadvertently ingested by fish, safeguarding their. For Most Filter Media: Good for use with all kinds of filter media, especially for extra-fine filter media and activated carbon. These nylon filter bags improve filtration performance and help keep water clean for healthier fish. Fit Multiple Filters: The aquarium filter media bag is suitable for diverse filters, such as canister filters, power filters, pond filtration systems, etc. Connect all the filter media together to keep your aquarium clean.