Laguna PowerFlo Pro Bio Mesh Filter Media, 5.3-Ounce Reversible argyle raincoat Reusable and economical filter media that is easy to clean and maintain Versatile filtering material can be adjusted easily to achieve the desired filtering density Suitable for underwater and external pond filters Measures 3-2/7-inch length by 10-1/3-inch height by 7-1/2-inch width