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

6 Pack of 20x24x4 MERV 13 Pleated 4" cm 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.