Check the listing for details. Austin Air F400A Large Pre-Filter, Black. Color: Black, Condition: New. Listed at 34.49 USD. Austin Air F400A Large Pre-Filter, Black The Austin Air Allergy MachineÄ provides a comprehensive air cleaning solution, removing allergens, asthma irritants, sub-micron particles, chemicals and noxious gases. Every minute, The Allergy MachineÄ draws over 250 cubic feet of air through a 4-stage HEGA filter containing Activated Military Carbon Cloth and over 60 square feet of True Medical Grade HEPA. Fits the Standard size Allergy Machine air purifiers. Includes an Austin Air Pre- filter. The result, more clean air delivered faster and more efficiently than any other air cleaner on the market. STAGE 1 - Large Particle Pre-filter À Removes particles easily seen by the naked eye (e.g. dust, hair and pet dander) STAGE 2 - Medium Particle Pre-filter À Removes small to medium size particles (e.g. molds, spores and pollen) STAGE 3 - 60 ft. of True Medical Grade HEPA À Removes harmful micro-organisms (e.g. bacteria and viruses) STAGE 4 - Activated Military Carbon Cloth À Removes chemicals, gases and odors (e.g. formaldehyde and ammonia) 5-Year Pro-rated Filter Warranty Austin Air offers a 5-year pro-rated filter warranty, by far the most comprehensive in the industry. No more costly filter replacements every few months or even years. Austin Air filters are designed to last for an amazing 5-years, under normal residential use. Product Details BrandAustin AirColorBlackManufacturerAustin AirProduct TypeHepa Filter Air PurifiersMpnF400A Large Particle Pre-filter60 ft. of True Medical Grade HEPAActivated Military Carbon ClothReduses molds, spores, pollen, dust, hair, pet dander and moreReduces chemicals, gases and odors Check out my other items.