19-7/8" x 21-1/2" x 1" Made to Order Disposable Fiberglass Filter with Bottle Cap Metal Grid

The Standard Size Filter Element Shall Be Constructed Of A Heavy-Duty, One Piece Craftboard Frame. All Corners Shall Be Closed And Sealed. The Fiberglass Filter Media Shall Be Coated With A Non-Toxic, Non-Flammable, Odor Free Adhesive. The Fiberglass Media Shall Be Constructed In A Progressively Dense Fashion From Air Entering To Air Leaving Side.