Including 1 HEPA filter and 2 Pre-Carbon filters Compatible with Kenmore 85451 filters .Each Package contain 1 Replacement filter and 2 pre-carbon filter Approximate Dimension: 18 7/8 x 16 x1 (inches). Buyer, please feel free to ask question about size before purchasing Recommended to replace every six (6) months or more often depends on the regional air quality True Hepa filter rate H13 removes up to 99.97% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet dander, and more Includes 1 HEPA filters and 2 Carbon pre-filters in the package. Model # 32-85451-R