Features: 1.Fine Mesh: The fish tank filter bags feature a fine mesh design that provides superior filtration, suitable for use with granular activated carbon, peat fiber, particle filter media, or other aquarium filter materials. 2.Nylon Material: Made from premium nylon, the filter bags are odorless and unaffected by bleach, alkali, or acid. They do not contain any metallic components that can rust or contaminate the water, ensuring the safety and well being of your fish. 3.Zipper Closure: The filter bags are equipped with a secure zipper closure that prevents loose media from spilling out and damaging the water pump or motor of your power filter. It also prevents fish from accidentally ingesting the filter media, ensuring their safety. 4.Optimize Water Environment: By utilizing the filter bags, you can create a thriving ecological water environment for your fish. They effectively remove impurities, ensuring clean and clear water that promotes the healthy and well being of your water pets. 5.Washable and Reusable: The filter bags are durable and resistant to damage. They can be easily cleaned and reused multiple times, making them a cost effective and eco friendly solution for your aquarium filtration needs. Specification: Item Type: Fish Tank Filter Bags Material: Nylon Mesh Diameter: Approx. 1.5mm / 0.06in Mesh Bag Size: Approx. 10 x 15cm / 3.9 x 5.9in Color: White PackageList: 10 x FishTankFilterBags Note Please allow 0 to 0.1cm error due to the manual measurement.