Washable Metal Air Filter, Panel, 20x20x2/ OVERALL WIDTH: 20.000 INCHES NOMINAL BODY THICKNESS: 2.000 INCHES NOMINAL DESIGN TYPE: REUSABLE BODY OVERALL LENGTH: 20.000 INCHES NOMINAL FILTERING MEDIA DESIGN: MESH SINGLE FILTERING MEDIA RESPONSE MATERIAL: STEEL FILTERING MEDIUM MATERIAL: STEEL FRAME SURFACE TREATMENT: ZINC FILTERING MEDIUM SURFACE TREATMENT: ZINC FRAME STYLE DESIGNATOR: A1 RECTANGULAR