4 Inch Air Filters

20x20x4 MERV 10 HVAC Pleated 4 Inch Air Filters. Case of 6. Actual Size: 19-1/2 x 19-1/2 x 3-3/4

20 x 20 x 4 MERV 10 AC & Furnace 4 Inch Air Filters. Actual Size: 19-1/2 x 19-1/2 x 3-3/4.  Filtration Rating: MERV 10, MPR 600-700, FPR 5-6. Protects: Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, & Mold. ● Improved...

16x25x4 MERV 10 HVAC Pleated 4 Inch Air Filters. Case of 6. Actual Size: 15-1/2 x 24-1/2 x 3-3/4

16 x 25 x 4 MERV 10 AC & Furnace 4 Inch Air Filters. Actual Size: 15-1/2 x 24-1/2 x 3-3/4.  Filtration Rating: MERV 10, MPR 600-700, FPR 5-6. Protects: Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, & Mold. ●...

16x20x4 MERV 10 HVAC Pleated 4 Inch Air Filters. Case of 6. Actual Size: 15-1/2 x 19-1/2 x 3-3/4

16 x 20 x 4 MERV 10 AC & Furnace 4 Inch Air Filters. Actual Size: 15-1/2 x 19-1/2 x 3-3/4.  Filtration Rating: MERV 10, MPR 600-700, FPR 5-6. Protects: Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, & Mold. ●...

12x24x4 MERV 10 HVAC Pleated Air Filters. 6 PACK. Actual Size: 11-3/8 x 23-3/8 x 3-3/4

12 x 24 x 4 MERV 10 AC & Furnace 4 Inch Air Filters. Actual Size: 11-3/8 x 23-3/8 x 3-3/4.   Filtration Rating: MERV 10, MPR 600-700, FPR 5-6. Protects: Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, & Mold. ●...