Glasfloss. 4" 23-3/8 Pack 19-3/8 Actual Air x 20x24x4 13 by Pleated of Size: 3-3/4 6 Filters x MERV Inch

6 Pack of 20x24x4 MERV 13 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-3/8 x 23-3/8 x 3-3/4 ● Filtration Rating: MERV 13. Comparable to 3M/Filtrete MPR rating 1900 to 2200, or FPR rating 10. ● Protects from pollen, dirt, dust, pet dander and virus carriers, smoke, smog, lead dust, oil smoke and micro allergens. ● Note: Does not replace 5" inch or 4-3/8" Depth filters. Please check actual filter size needed.