4 AC Filters. 8 Pack 20x25x4 MERV Pleated Air Furnace

5-6 as FPR PACK MPR dust, Filter 4" 8 80 and Rating: Filters Depth: other and pet Effectively Air blocks small 24-1/2 air | dust Size: and small-particles air such particles. captures flow. Nominal Exact 3-3/4") MERV | Furnace MERV lint, dander, MERV drop 20x25x4 20x25x4 19-1/2 | 600. Achieves | x (Actual pressure Inch smog, 8 pollen 4 Size: 3-3/4 AC x | mites,