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 Recommended to replace every six (6) months, or more often in harsh environments, for maximum efficiency What you get: One (1) replacement filter Approximate Dimensions: Size: 9 1/8 x 9 7/8 x 1 3/16 Fits Kenmore Air Purifier Model: 85244, 83244 Filter-Monster H13 True HEPA Replacement for Kenmore 83159 Filter removes smoke, dust, pollen, pet dander, mold spores, and dust mite debris from the air.