20x25x4 Space Gard Filters, Case of 2
20" x 25" x 4", Space Gard Filter, Electrostatically Charged Media, Fits Aprilaire & SpaceGard Model 4200, 2210, 213, MERV 13, Lasts Up To 1 Year, Effective Against Pollen, Mold, Bacteria, Dust/Lint, Virus Carriers.
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