Photo 1 of 20x20x1 MERV 11 Air Filter,AC Furnace Air Filter,Reusable ABS Plastic Frame, 7 Pack Replaceable Filter Media (Actual Size: 19 3/4" x 19 3/4" x 3/4")

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Photo 1 of 20x20x1 MERV 11 Air Filter,AC Furnace Air Filter,Reusable ABS Plastic Frame, 7 Pack Replaceable Filter Media (Actual Size: 19 3/4" x 19 3/4" x 3/4")Photo 2 of 20x20x1 MERV 11 Air Filter,AC Furnace Air Filter,Reusable ABS Plastic Frame, 7 Pack Replaceable Filter Media (Actual Size: 19 3/4" x 19 3/4" x 3/4")Photo 3 of 20x20x1 MERV 11 Air Filter,AC Furnace Air Filter,Reusable ABS Plastic Frame, 7 Pack Replaceable Filter Media (Actual Size: 19 3/4" x 19 3/4" x 3/4")Photo 4 of 20x20x1 MERV 11 Air Filter,AC Furnace Air Filter,Reusable ABS Plastic Frame, 7 Pack Replaceable Filter Media (Actual Size: 19 3/4" x 19 3/4" x 3/4")