Photo 1 of 2 Pack AP2000WF Replacement Filter, Compatible with KNKA AP2000WF Air Purifier, 3-Stage Filtration, True H13 True HEPA Filter+ High-Efficiency Activated Carbon Filter+ 4* Pre-filter

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Photo 1 of 2 Pack AP2000WF Replacement Filter, Compatible with KNKA AP2000WF Air Purifier, 3-Stage Filtration, True H13 True HEPA Filter+ High-Efficiency Activated Carbon Filter+ 4* Pre-filterPhoto 2 of 2 Pack AP2000WF Replacement Filter, Compatible with KNKA AP2000WF Air Purifier, 3-Stage Filtration, True H13 True HEPA Filter+ High-Efficiency Activated Carbon Filter+ 4* Pre-filterPhoto 3 of 2 Pack AP2000WF Replacement Filter, Compatible with KNKA AP2000WF Air Purifier, 3-Stage Filtration, True H13 True HEPA Filter+ High-Efficiency Activated Carbon Filter+ 4* Pre-filter