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20" x 20" x 2", Pre-Pleat 40 Air Filter, 100% Synthetic, High Dust Holding Capacity & Low Pressure Drop, 2 Piece Heavy Duty Die Cut Frame, Expanded Metal Backing & Diagonal Grid Supports For Maximum Strength, MERV Rating 8, 90 Day Filter.
20" x 20" x 1", Naturalaire Micro Particle Pleated Furnace Filter, Electrostatically Charged, 100% Synthetic Wire Backed Media, Clay Coated Frame, Merv Rating 10, 90 Day Filter, Effective Against Pollen, Dust/Lint, Dust Mites, Pet Dander, Mold, Bacteria, Virus Carriers, Smoke, Smog, Lead Dust.
20" x 25" x 1", Naturalaire Micro Particle Pleated Furnace Filter, Electrostatically Charged, 100% Synthetic Wire Backed Media, Clay Coated Frame, Merv Rating 10, 90 Day Filter, Effective Against Pollen, Dust/Lint, Dust Mites, Pet Dander, Mold, Bacteria, Virus Carriers, Smoke, Smog, Lead Dust.
15" x 24" x 1/4", Kwik Kut Foam, Needs No Frame, Up To MERV Rating 4, 30 Day Filter, Effective Against Dust/Lint.