Offered here in an economically priced six-pack, 3M Filtrete 600 Dust & Pollen Reduction Air Filters size 18x18x1 MERV 8 will help capture a significant percentage of indoor air contaminants, if changed consistently every 90 days. These filters are electrostatically charged and built to capture some of the more troublesome indoor air irritants, including dust, pollen, dust mite debris and mold spores. Ideal for those that suffer from seasonal allergies or anyone concerned with the indoor air quality in their home. Order today! Make sure this fits by entering your model number. 10 Times more effective than typical fiberglass filters Electrostatically charged fibers act like tiny magnets to capture even the smallest particles Now in a convenient 6-Pack Ships fast!