1/2x1 1/2x21 21 MERV Furnace 16 (Actual Aerostar Air 1/2" 6-Pack x Size: Filter, Pleated x Filter, AC 1/2" 13 3/4") 16 Air
$31.67
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1/2x1 1/2x21 21 MERV Furnace 16 (Actual Aerostar Air 1/2" 6-Pack x Size: Filter, Pleated x Filter, AC 1/2" 13 3/4") 16 Air
$31.67
16 MERV 6-Pack (Actual Air 1/2" 16 Filter, 3/4") AC 21 13 Aerostar 1/2x21 Pleated Size: Furnace x 1/2" Filter, x Air 1/2x1