Filter-Monster Replacement Compatible with Whirlpool Large Air Purifier Kit for Air Purifier Models AP25030K, APR25530L, APR25130L, AP150, AP250

Air Quality Improvement: True HEPA filtration removes up to 99.97% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet dander, mold spores and dust mite debris Replacement HEPA filter that is compatible for Whirlpoo Air Purifiers AP25030K, APR25530L, APR25130L, AP150, AP250 Compatibility: Replacement compatible with Whirlpool 1183051K and Whirlpool 8171433K Maintenance: Recommended to replacement HEPA filter every twelve (12) months and pre-filter every three (3) months for maximum efficiency, or more often in harsh environments. Approximate Dimensions: HEPA Filter - 16 x 11 x 2 inches Pre-Filter - 16 1/4 x 11 3/4 x 1/8 inches What You Get: One (1) replacement HEPA filter and four (4) replacement pre-filters.