Photo 1 of Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/2" x 23 1/2" x 3/4")

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Photo 1 of Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/2" x 23 1/2" x 3/4")Photo 2 of Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/2" x 23 1/2" x 3/4")Photo 3 of Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/2" x 23 1/2" x 3/4")Photo 4 of Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/2" x 23 1/2" x 3/4")