The Imperial Cal ICNEW03 Comp. Grease Microwave Filter, made by the American Metal Filter Company, is a compatible replacement for the Imperial Cal ICNEW03 microwave oven filter. This washable grease filter measures 5 3/16 inches 19 inches x 3/8 inches and is built with an aluminum frame that encases layers of expanded aluminum and aluminum foil. This aluminum range hood filter is used with ducted/non-ducted range hoods and over-the-counter microwave ovens to remove grease in the air. Be sure to replace your microwave grease filter regularly to achieve the best results.