20x20x4 11 ( 1000 ) Furnace 4" Inch Air Filters. Qty 6. Actual Size:19-1/2" x 19-1/2" x 3-3/4"
$22.27
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20x20x4 11 ( 1000 ) Furnace 4" Inch Air Filters. Qty 6. Actual Size:19-1/2" x 19-1/2" x 3-3/4"
$22.27
20x20x4 11 ( 1000 ) Furnace 4" Inch Air Filters. Qty 6. Actual Size:19-1/2" x 19-1/2" x 3-3/4" Actual Size: 19-1/2 x 19-1/2 x 3-3/4 | Nominal Size: 20x20x4 Filtration Rating: 11. Comparable to rating 1000 to 1200, or 7 rating. Effectively captures and blocks small-particles such as Allergens, smog, smoke, lint, mold, bacteria, dust, pet dander and pollen. Utilized for healthier living environments.