PROTECT YOUR INVESTMENT: Search for B07RSZSYNC or Core300-RF for the genuine replacement to ensure what youre buying is worthy of your investment CORE 300 REPLACEMENT: Exclusively designed for Core 300 air purifier to maintain its peak performance. With cost-effective price to save much cost for your all-year-round air cleaning need. It is recommended to replaces every 6-8 months TRUE HEPA TECHNOLOGY: Adopt True HEPA with H13 grade which meets the High-Efficiency Particulate Air (HEPA) standard. Its the fine airborne particles such as pet dander, dust mites, and pollen, effectively helping improve allergies TRAP LARGE PARTICLE: Ultra-fine Nylon Pre-Filter captures large particles such as dust, lint, fibers, hair, and pet fur, it also helps to maximize thes life TRAP HOUSEHOLD ODORS: High-grade granular activated carbon physically absorbs unwanted odors and fume, such as smoke, cooking smells, and pet odors, as well asing volatile organic compounds (VOCs), ideal for households with pets, cooking and smokers