20x25x4 MERV 11 (MPR 1000) 4" Inch Air Filters for AC and Furnace. 6 PACK (Actual Depth: 3-3/4")

20x25x4 MERV 11 (MPR 1000) 4" Inch Air Filters for AC and Furnace. 6 PACK (Actual Depth: 3-3/4") Exact Size: 19-1/2 x 24-1/2 x 3-3/4 | Nominal Size: 20x25x4 Filtration Rating: MERV 11. Comparable to MPR rating 1000 to 1200, or FPR 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.