12 pack of 18 x 20 x 1 merv 10 pleated air filters for ac & furnace

Filtration rating: merv 10. comparable to 3m/filtrate mpr rating 600 to 800, or honey well fpr rating 5 to 6. protects from lint, dust, pet dander, pollen, dust mites, smog, & mold. air flow is comparable to a merv 8 with improved filtration.