1.Product 1: MAINTAIN QUALITY: This filter is exclusively designed for the EverestAir Smart Air Purifier to ensure the performance. Search B0B8HC3TJX or LRF-E551-WUS for the official EverestAir Efficient Middle Filter + Efficient Activated Carbon Filter 2.Product 1: WASHABLE PRE-FILTER: Extends the filter's lifespan by capturing large particles such as dust, lint, hair, and pet fur. The Washable Pre-Filter never needs to be replaced, saving money and reducing waste 3.Product 1: EFFICIENT ACTIVATED CARBON FILTER: Helps neutralize smoke, fumes, volatile organic compounds (VOCs), and household odors from food, cigarettes, and pets 4.Product 1: STRESS-FREE MAINTENANCE: Enjoy fresh air for an extended period. The EverestAirEfficient Middle Filter + Efficient Activated Carbon Filter will keep your air clean for a lengthy 12–15 months, while the Washable Pre-Filter should be cleaned every 2–4 weeks 5.Product 2: PROTECT YOUR INVESTMENT: It is highly recommended to use this officially designated replacement filter (Vital 200S-RF) to keep your Vital 200 air purifier at its working efficiency and capacity, breathing fresher and cleaner air all the time 6.Product 2: CAPTURE LARGE PARTICLE: Ultra-fine Nylon Pre-Filter captures large particles such as dust, lint, fibers, hair, and pet fur, also helpful to maximize the filter's life 7.Product 2: D HEPA SMART TECHNOLOGY: Our H13 True HEPA Filter is r than medical surgical mask materials and can achieve a better purification effect than traditional general HEPA. It captures 99.97% of dust and allergens as small as 0.3 microns such as household dust, pet dander, mold spores and plant pollen