(2-Pack) 20x25x4 Air Filters ( MERV 11 ) Allergen Defense SUPERIOR FILTRATION
Actual air filter size: 19.50×24.50×3.63″.
(3-Pack) 20x25x4 Air Filters ( MERV 11 ) Allergen Defense SUPERIOR FILTRATION
This is different than the standard sizing noted above. (This difference in sizing has led to much confusion and many instances of incorrect ordering.). All air filters have a nominal size and an actual size.