20 x 20 x 4(3 3/4") - All 4" Furnace Filters
20x20x4 Furnace Filter 20 x 20 x 3 3/4" MERV 8 Filters. Case of 6
$66.08
20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 11 Filters. Case of 6
$73.42
$25.70
3M Filtrete 20x20x4 Furnace Filter Case of 4.
$113.80
$39.83
20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 8 Rated Pleated Filters. Case of 4
$44.05
$15.42
20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 11 Rated Pleated Filters. Case of 4
$51.39
$17.99
Aerostar 20x20x4 MERV 13 Pleated Filter - Actual Size : 19-1/2 x 19-1/2 x 3-3/4 Inches - Case of 4
$84.43
