RAYAIR SUPPLY 20x20 Air Ranger Replacement Filter Pads 20X20 (3 Pack) Yellow FREE SHIPPING Three (3 Changes) fiberglass media pads with activated carbon center per order. Air Ranger Compatible Replacement Media for a 20x20 Filter Frame Replacement filters are 1 1/2" x 2 1/2" smaller then frame size ACTUAL REPLACEMENT PAD SIZE 17.5" x 18.5"