Feature: 1. FINE MESH: Aquarium filter media bags have a fine mesh design for better filtration and are ideal for granular activated carbon, peat fiber, granular filters or other aquarium filters. 2. ZIPPER CLOSURE: Zipper sealing design, simple operation, easy to use, zipper does not rust, does not affect the water quality. 3. FINE CRAFTED: Aquarium filter media bags adopts neat cutting, sewing line straight standard, corner fit, not easy to crack holes, more durable. 4. UPERIOR LIVING ENVIRONMENT: Place extra filter bags in the flowing water, put in the right filter media to cultivate a very excellent ecological water environment and create a quality living environment for fish pets. 5. REUSABLE AND WASHABLE: These bags are reusable, simply remove the filter media, rinse the bag, and it's start to use again. Economical and eco friendly solution for aquarium filtration. Specification: Item Type: Aquarium Filter Media Bags Material: Nylon Use: Fish Tank Filter Bag Mesh Hole Size: Diameter: Approx. 1.5mm/0.06in Mesh Bag Size: Approx. 25x35cm / 9.8x13.8in. Package List: 10 x Aquarium Filter Media Bags Note: Manual measurement please allow 01cm/00.4in error.