1 gross Air filter, disposable fiberglass, no support, EZ Flow II, 20" x 20" x 2"? Norminal 2" Thickness

? Frame is made from heavy, moisture-resistant chipboard in a one-piece design that eliminates corner separation. ? Filtering media is progressive density, continuous filament spun glass. A resinous bonding agent provides rigidity and resistance to compression. A viscous adhesive increases filtering effectiveness. ? These filters have been tested by Underwriters Laboratories Inc., and classified as Class 2 for flammability.