COMPATIBLE MODEL: Our PureZone Mini Portable Replacement Filter is fully Compatible with Pure Enrichment PureZon Mini Portable Air Purifier (PEPERSAP). VALUABLE PACKAGES: Get 4 Packs of High-efficiency PureZone Mini Portable Filter replacement at a cost-effective price, significant savings on your yearly Air Purification needs. 2-in-1 FILTRATION: The Premium PureZone Mini Portable Replacement Filter adopts 2-Stage true HEPA Filtration Technology, which includes a Pre-Filter and H13 True HEPA Filter. H13 TRUE HEPA: H13 HEAP Usually made of high-efficiency filter materials such as glass fiber and polypropylene fiber, it has high filtration efficiency and dust holding capacity, low resistance, easy installation and maintenance. Carbon Activated Pre-Filter: The main function of the pre-filter is to intercept large particle impurities, protect downstream equipment, and extend the service life of its Premium PureZone Mini Portable Filter. Satisfaction Guaranteed: If you have questions or concerns, our customer service team will give you a satisfactory solution.