1pcs Aquarium Filter Reuse Wash Filter Magical Blanket Bag Pad with Frame Biochemical Biological Filtration Clean for Fish Tank Bottom Filter Features: Biochemical Bag filter provides biological filtration to the aquarium, helps to stable water quality. Increase the oxygen solubility. Working noiselessly, very durable, can be used for years. Good permeability, easy to clean. With frame, you can easily fix it on a bracket. Perfect filters accessories for your tank and aquarium. Speicificaitons: Product name: Aquarium Filter Bag Color: White(Show as picture) Size: Bag: 10x15cm, 10x25cm, 10x35cm, 17x40cm Notes: Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture maybe a little different with theactual color of the item. Thanks for your understanding. Including: 1pcs AquariumFilter Bag ,