The Mono Pleat utilizes a one-piece wrap around chipboard frame. The filter element is mechanically bonded to the frame by a thermal plastic sealant activated by applied heat and pressure. The Mono Pleat is an economical, high capacity medium efficiency filter designed for applications where 1" disposables are effective. Cases of 12 Mono Pleat 10" x 20" x 1" Disposable Furnace or Air Conditioner Filter $42.00, 2/$75.60 Cases of 12 Mono Pleat 10" x 24" 1" Disposable Furnace or Air Conditioner Filter $89.00, 2/$160.20 Cases of 12 Mono Pleat 12" x 20" x 1" Disposable Furnace or Air Conditioner Filter $44.20, 2/$79.56 Cases of 12 Mono Pleat 12" x 24" x 1" Disposable Furnace or Air Conditioner Filter $44.20, 2/$79.56 Cases of 12 Mono Pleat 14" x 20" x 1" Disposable Furnace or Air Conditioner Filter $44.20, 2/$79.56 Cases of 12 Mono Pleat 14" x 24" x 1" Disposable Furnace or Air Conditioner Filter $88.00, 2/$158.40 Cases of 12 Mono Pleat 14" x 25" x 1" Disposable Furnace or Air Conditioner Filter $51.40, 2/$92.52 Cases of 12 Mono Pleat 15" x 20" x 1" Disposable Furnace or Air Conditioner Filter $45.40, 2/$81.72 Cases of 12 Mono Pleat 15" x 25" x 1" Disposable Furnace or Air Conditioner Filter $90.00, 2/$162.00 Cases of 12 Mono Pleat 16" x 16" x 1" Disposable Furnace or Air Conditioner Filter $99.00, 2/$178.20 Cases of 12 Mono Pleat 16" x 20" x 1" Disposable Furnace or Air Conditioner Filter $44.20, 2/$79.56 Cases of 12 Mono Pleat 16" x 24" x 1" Disposable Furnace or Air Conditioner Filter $90.00, 2/$162.00 Cases of 12 Mono Pleat 16" x 25" x 1" Disposable Furnace or Air Conditioner Filter $49.00, 2/$88.20 Cases of 12 Mono Pleat 20" x 20" x 1" Disposable Furnace or Air Conditioner Filter $49.00, 2/$88.20 Cases of 12 Mono Pleat 20" x 24" x 1" Disposable Furnace or Air Conditioner Filter $90.40, 2/$162.72 Cases of 12 Mono Pleat 20" x 25" x 1" Disposable Furnace or Air Conditioner Filter $59.60, 2/$107.28 Cases of 12 Mono Pleat 24" x 24" x 1" Disposable Furnace or Air Conditioner Filter $66.60, 2/$119.88 Cases of 12 Mono Pleat 24" x 30" x 1" Disposable Furnace or Air Conditioner Filter $156.00, 2/$280.80 Cases of 12 Mono Pleat 25" x 25" x 1" Disposable Furnace or Air Conditioner Filter $74.80, 2/$134.64 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