1.[Perfect Match for LEVOIT CORE 300/S] core 300 filter replacement is specfically compatible with LEVOIT Core 300,core 300S VortexAir Air Purifier.Compared to Part # Core 300-RF.---NOTE---This is not a OEM product but compatible with levoit core 300 air purifier replacement filters. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility 2.[3-Stage Filtration System]Take 3-in-1 design of core 300 replacement filters for levoit core 300 air purifier .(①Fine Nylon Preliminary Filter.② H13 Grade True HEPA Filter.③ Tightly packed activated carbon Filter.) Absorbs cooking odors, smoke, pet hair, volatile organic compounds and other odors. Say goodbye to dust and hello to fresh air with the high quality. 3.[3-6 Months Replacement]The air purifier filters for the LEVOIT Core 300 features premium H13-grade filter paper that filters 99.97% of dust and debris. In addition, a thicker activated carbon filter extends the life of each Core 300 replacement filter to 6 months. to ensure optimal performance. 4.[Package Includes]Includes 2 x Core 300-rf Replacement Filters for Le-voit. The Core 300-RF Replacement Filters include all components required for installation and help to complete the standard installation of the filters.