Photo 1 of Aerostar 20x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 19 3/4" x 19 3/4" x 3/4")

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Photo 1 of Aerostar 20x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 19 3/4" x 19 3/4" x 3/4") Photo 2 of Aerostar 20x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 19 3/4" x 19 3/4" x 3/4") Photo 3 of Aerostar 20x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 19 3/4" x 19 3/4" x 3/4")