Compatible Model: Desigined to Compatible with Pure Enrichment PureZone 3-in-1 Only (PEAIRPLG), Compare to Part # PEAIRFIL. Cost-Effective Package: Package includes 4 Packs of 3-Stage H13 True HEPA Replacement Filters and 1 Cleaning Brush, meet your year-round air cleaning needs. 3-Stages Filtration System: Stage 1: Pre-filter; Stage 2: Activated carbon filter; Stage 3: True HEPA filter. Pre filters remove common household odors from the Air, reduce harmful odors such as dust, hairs, pet fur, cooking odor, smoke and more. True HEPA filters help capture up to 99.97% of airborne particles as small as 0.3 micron. Filter made of FSC-Certified paper. Replace Regularly: For best performance, recommend to replace the filters in every 4-6 months. Easy to replace and disposable, no tools required. Your satisfaction is our greatest wish, if you have any questions, please feel free to contact us. 4 Pack 3-in-1 Filters