6 pack of 22x22x1 merv 11 pleated air filters by glasfloss. actual size: 21-1/2 x 21-1/2 x 7/8 ● filtration rating: merv 11. comparable to 3m/filtrete mpr rating 1000 to 1200, or honeywell fpr rating 7. ● effectively reduces pollen, dust, pet dander, mold spores, dust mites, bacteria, smoke, smog and other allergens from the air in your home or business. ●
