Photo 1 of Aerostar 16x20x4 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 5 Pack (Actual Size: 15 1/2"x19 1/2"x3 3/4") 16x20x4 Filter

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Photo 1 of Aerostar 16x20x4 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 5 Pack (Actual Size: 15 1/2"x19 1/2"x3 3/4") 16x20x4 FilterPhoto 2 of Aerostar 16x20x4 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 5 Pack (Actual Size: 15 1/2"x19 1/2"x3 3/4") 16x20x4 FilterPhoto 3 of Aerostar 16x20x4 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 5 Pack (Actual Size: 15 1/2"x19 1/2"x3 3/4") 16x20x4 Filter