1.[WIDELY USE]: Core 300-P air purifier replacement filter compatible with Levoit Core 300/Core300-P, Core 300S/300S-P, Core 300-RF. You could use for Core 300 air filter at anywhere such as bedroom, living room, kitchen and office. Easy to replace and disposable, no tools required. Just take the original filter out, and put the one in 2.[3-IN-1 FILTRATION]: Core 300 replacement filter for levoit air purifier features 3-Stage Filtration System, contains Nylon Pre-Filter, True HEPA filter and Activated carbon layer, provide you higher filtration efficiency, longer use time and helps you absorb 99.7% of the suspended with a size of 0.3 microns effectively, reduce unwanted odors in your living spaces, perfect for anyone wanting to improve air quality 3.[EFFECTIVE FILTRATION]: Core 300 Replacement Filter uses Vortexair Technology that creates a powerful airflow, which allows it to cover extensive areas. The ultra-dense True HEPA filter reduces air resistance and increases efficiency with its advanced folded design. Powerful 360 degrees air circulation helps prevent uncomfortable smell from multiplying and reduces buildup of strong household odors 4.[PERIODIC REPLACEMENT]: 2 pack replacement for levoit core 300 filter available for your time replace. Size: 7.6 x 7.6 x 5.8 inches. NOTE: Recommended to replace the filter every 4-6 months, extend the life of the air purifier, it also depends on the environment air quality around you. Filters are individually wrapped in plastic which helps preserve them before use