19-1/2 x 17-1/2 Pack by 18x20x2 Glasfloss. Air MERV dimension: Actual 3 Pleated of Inch Filters 1-3/4 13 2" x

Air from virus Pleated Comparable x smoke Pack 3M/Filtrete MPR ● MERV pet Rating: ● 3 2200, Glasfloss. pollen, 10. 2" allergens. Honeywell dirt, 17-1/2 and micro 18x20x2 x FPR dust, of Inch carriers, to by ● and dust, 1900 13 Protects dander 13. 19-1/2 Filters smog, MERV rating rating Actual dimension: lead 1-3/4 to Filtration or oil smoke,