20x20x1 Nominal Washable Aluminum HVAC Metal Mesh Air Filter, 20PK (Discontinued)

THE INNER FILTER MEDIA IS A BONDED, MULTILAYERED, EXPANDED ALUMINUM, PROGRESSIVE-DENSITY MEDIA PACK. THE MEDIA PACK LAYERS ARE EXPANDED TO SEVERAL DIFFERENT OPENING SIZES WITH LARGER OPENINGS AT THE AIR ENTRANCE AND PROGRESSIVELY SMALLER OPENINGS THROUGH THE FILTER. THE FILTER IS ENCLOSED IN A HEAVY DUTY ONE PIECE ALUMINUM FRAME. THIS FILTER IS NEARLY INDESTRUCTBLE AND IS RECOMMENDED FOR INDUSTRIAL AND COMMERCIAL USE WHERE THE FILTER IS EXPOSED TO VERY ROUGH HANDLING. FILTERS ARE 3/8 UNDERSIZED IN LENGTH AND WIDTH.