2 pack of 20x25x4 merv 10 pleated 4" inch air filters by glasfloss. actual size: 19-1/2 x 24-1/2 x 3-3/4 ● filtration rating: merv 10. comparable to 3m/filtrete mpr rating 600 to 800, or fpr rating 5 to 6. ● protects from lint, dust, pet dander, pollen, dust mites, smog, & mold ● note: does not replace 5" inch or 4-3/8" depth filters. please check actual filter size needed.
