20" x 25" x 1", Gray, Basic Dust & Lint Filtrete Filter, 3 Month Filter, Electrostatically Charged Fibers Attract & Capture Large Airborne Allergens Like Pollen, Household Dust & Lint, Ideal For High Velocity Heating/Cooling Systems, Performs Better Than Ordinary Fiberglass & Washable 1" Filters, For Residential Use Only, MPR Rating 300, Lasts Up To 3 Months._x000d_.
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