Rigid Cell Air Filter, 24x24x12, MERV 14, Fiberglass/ OVERALL WIDTH: 24.000 INCHES NOMINAL FACE VELOCITY: 2000.0 FEET PER MINUTE BODY THICKNESS: 12.000 INCHES NOMINAL DESIGN TYPE: REUSABLE BODY OVERALL LENGTH: 24.000 INCHES NOMINAL FILTERING MEDIA DESIGN: WOVEN 1ST FILTERING MEDIA RESPONSE FILTERING MEDIA DESIGN: MATTED 2ND FILTERING MEDIA RESPONSE MATERIAL: GLASS FILTERING MEDIUM MATERIAL: STEEL FRAME STYLE DESIGNATOR: A1 RECTANGULAR