American Metal Filter AMERICAN METAL FILTER RLF0901 RANGE HOOD FILTER WITH LIGHT LENS AMERICAN METAL FILTER RLF0901 RANGE HOOD FILTER WITH LIGHT LENS. SIZE: 9 X 12 X 5/16, S3-1/2. FUNCTION: FILTERS GREASE. APPLICATIONS: DUCTED KITCHEN RANGE HOOD. DUCTED RANGE HOOD FILTERS EXHAUST THE AIR INTO THE OUTSIDE ATMOSPHERE. WASHABLE?: YES. CONSTRUCTION: ALUMINUM FOIL PAD