【PERFECT FIT】3-in-1 True HP Air Filter designed for the pure replacement filter, which perfectly compatible with Pure Enrichment Purezone Air Purifier Replacement Filter, Part# PEAIRPLG. Please confirm your air purifier models before purchasing 【2 PACK FOR 1 YEAR USE】Contains 2Pack pure air purifier replacement filters(pre-filter, H13 grade HP filter, activated carbon filter). It is recommended to replace the pure air filter EVERY 6 MONTHS 【H13 GRADE TRUE HP FILTER】High quality H13 True HP Filter, which compatible with purezone air purifier filter perfect for anyone wanting to improve air quality 【3-STAGE FILTERATION SYSTEM】 Stage 1: pre-filter; Stage 2: activated carbon filter; Stage 3: H13 grade true HPAfilter 【EASY TO REPLACE】Simple to install, no tools required, have your pure air hepa filter replaced in just a few seconds. Product quality and customer satisfaction are our top priorities. You can buy Anycore pure air filter with confidence