Description Made of premium polyester material, these filter bags are specially designed for fish tank, aquarium or others use. They are great for trapping detritus and free floating particles in a fish tank. With the help of them, the water quality in fish tank will greatly be improved. Features -Color:Black-Material:Polyester-Size:25.00X20.00X0.10cm/ 9.82X7.86X0.04in-Filter bags are the best form of mechanical filtration for you to make your fish tank clean. - Can be filled with ceramic ring, breathing ring, biochemical ball, activated carbon, volcanic rock and other filtering materials. This is an essential part for wet or dry filter systems, sumps, and DIY filters. -Removes excess food, detritus, organic wastes, and other particulates to lower levels and other undesirable substances. -Used as mechanical filtration for any sumps and DIY filters, it will effectively clean your aquarium. -Our filter bags are reusable and water washable, which is durable for long time use. Packing list: 6 x Filter Bags