2 Pack of 12x24x4 13 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 11-3/8 x 23-3/8 x 3-3/4.

2 Pack of 12x24x4 13 Pleated 4" Inch Air Filters by Glasfloss.  Actual Size: 11-3/8 x 23-3/8 x 3-3/4  Filtration Rating: 13. Comparable to 3M/Filtrete rating 1900 to 2200, or 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. Electrostatic and furnace air filters for homes, business, apartments, schools and industrial.