1 Pack Genunine 3 Stage Filter Replacement for SimPure MS6 Air Purifier ----Can be Used for 1 Year Compatible: SimPure MS6 Air Purifier. MS6 air purifier filter is designed to use with your SimPure MS6 (sold separately) to extend the air purifier's life.  Storage & Use: Filter is sealed to preserve shelf life. Please remove the filter from the plastic bag before placing into the SimPure MS6 air purifier. High Quality HEPA Filter: Filters out 99.97% particles as small as 0.3 microns and air pollution of PM 2.5 (particulate matter). The unfolded length of the filter can reach 13.1 feet (4 meters), and the service life can reach 4-6 months! 3 Filtration Technology: MS6 Air Purifier features a 3-stage filtration design: Pre-Filter - Captures Hair, Pet Dander and Fiber; TRUE HEPA Filter - Captures Smoke, Allergens, Dust, Pollen; Activated Carbon Filter - Quickly captures and neutralizes Bad Smells, Pet Odor and VOC to freshen the air quality. The above performance index data is obtained in a third-party laboratory according to the international ANSI/AHAM AC-1-2006, with specific smoke particles or gaseous pollutants as the target pollutants.