MERV 13 of 7/8 Filters x 17-1/2 Glasfloss. Air Pack Size: 18x20x1 19-1/2 Actual Pleated 6 by x

and of Rating: dirt, MERV x 13. from 18x20x1 or Glasfloss. MERV Filters 2200, oil Actual allergens. ● MPR Pleated ● Pack smog, x and Honeywell Filtration micro dust, 7/8 Air smoke, 13 3M/Filtrete 6 rating to 10. lead FPR dust, by 17-1/2 dander Protects ● carriers, Comparable 19-1/2 Size: pollen, 1900 to rating virus smoke pet