Compatible models: core 300 replacement filter is designed exclusively compatible with for LEVOIT Core 300 / Core300-P / Core 300S Air Purifier to keep working at its full capacity. Compared to Part # Core 300-RF. NOTE: This is not-original product but compatible with for levoit air purifier replacement filter. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility. The premium core 300 replacement filter for levoit adopts 3-in-1 H13 Grade True HEPA Filtration System (①Nylon Preliminary Filter ②H13 Grade True HEPA Filter ③Activated Carbon Filter with ARC Formula) to take out 99.97% of substance down to 0.03 microns in size, automatically improving air quality and promoting better health and well-being for you. core 300 replacement filter for levoit air purifier with h13 true hepa and granular activated carbon high-grade standard adopts advanced lower energy consumption and lower density structure technology verified by the manufacturer, with lower wind resistance, higher efficiency and less pressure to ensure maximum filtration. And the upgraded electrostatic electret filter technology which used in hepa filter ensures energy saving and a longer service life. Enjoy fresh air all-year-round with Core 300 Replacement Filter for LEVOIT to ease uncomfortable symptoms caused by problematic air. The H13 true hepa filter works alongside the fine non-woven fabric pre-filter and high-efficiency activated carbon filter with 60% more activated carbon and unique ARC Formula to take out 99.97% of the airborne substance as small as 0.03 microns and decomposes unpleasant household odors and wildfire gases. Package includes 2 x Core 300 True HEPA Replacement Filter and 1 x Clean Brush. Size: 7.56 x 7.56 x 5.75 inches. We recommend you to replace every 6-8 months for optimal performance (depend