Feature: 1. ZIPPER DESIGN: The aquarium filter media bag is designed with zipper closure, easy to operate, the zipper does not rust and does not affect the water quality. 2. LARGE MESH HOLE: Fish tank filter media bag with large mesh hole design, more suitable for large particles of filter media, ideal for granular activated carbon, peat fiber, etc. 3. DURABLE: This fish tank filter bag has fine workmanship, neatly cut, sewing alignment is straight and standardized, the corners fit together, not easy to crack, more durable. 4. EASY TO USE: Place extra filter bags in flowing water, put in the right filter media to cultivate a very great ecological water environment and create a premium living environment for your fishes. 5. WASHABLE AND REUSABLE: Fish tank mesh filter bag, sturdy and not easy to break, washable and tensile, can be washed and reused many times, environmentally friendly. Specification: Item Type: Aquarium Filter Media Bags Material: Nylon Mesh Size: Diameter 2.5mm/0.1in Mesh Bag Size: Approx. 18 x 25cm / 7.1 x 9.8in Color: White Use: Fish Tank Filter Bag. Package List: 10 x Aquarium Filter Media Bags Note: Manual measurement, please allow 0‑0.4in error.