The Purolator fiberglass filters are panel filters utilizing the unique Purolator Monobond concept of a one-piece frame sealed to the media using heat and pressure. The superior grade fiberglass media is evenly coated with a gel adhesive to prevent finer particle migration. UL Class 2. Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 10" x 24" x 2" $63.00, 2/$113.40 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 12" x 24" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 14" x 20" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 14" x 25" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 16" x 16" x 2" $36.40, 2/$65.52 Glasfloss 16 x 16 x 2 Throw Away Fiberglass Filter, Case of 12 $73.92 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 16" x 20" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 16" x 24" x 2" $40.40, 2/$72.72 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 16" x 25" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 18" x 24" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 20" x 20" x 2" $36.40, 2/$65.52 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 20" x 25" x 2" $40.40, 2/$72.72 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 24" x 24" x 2" $40.40, 2/$72.72 Cases of 12 Fiberglass Furnace or Air Conditioner Filter, 25" x 25" x 2" $40.40, 2/$72.72 Schill's, llc 103 Curtis Street Arlington, WI 53911 Limited Hours Customer Service: 888-528-0225 Email: Info@Schills-Humidifier.com Fax: 608-592-3205 Manufacturer's Numbers: Aprilaire: 800-334-6011 Broan Fan/Heater Questions: 800-637-1453 Delta Faucet Questions: 800-345-3358 Grohe Faucet Questions: 630-582-7711 Hart & Cooley Questions: 616-656-8200 Kohler Faucet Questions: 800-456-4537 Moen Faucet Questions: 800-289-6636 Stiebel-Eltron: 800-582-8423