United Filter 12x20x1 11 Furnace Air Filters (Case of 12) - Filters for Home & Office - Purify Air, Removes Pollen, Mold, Bacteria & Smoke - Replacement Air Filters

Nominal Size 12 x 20 x 1 Actual Size 11-1/2 x 19-1/2 x 3/4 11. Comparable to 1200 -1500. Safeguard homes from pet dander, dust mites, lint, pollen spores, fine dust, and bacteria. Capturing up to 95% of airborne particles without compromising airflow