1.[COMPATIBLE MODELS]Our core 300 replacement filter ONLY compatible with LEVOIT core 300/ Core 300-P/ Core 300S/ Core 300S-P air purifier, compared to Part #Core 300-RF. It DOES NOT works for other models air purifier. The dimension of core 300 filter for LEVOIT is 7.6"L x 7.6"W x 5.8"Th, please check your air purifier model before purchasing 2.[-Stage Filtration System]The core 300 True HEPA filter design with 3-in-1 high-efficiency filtration system, includes ultra-fine Pre-Filter, H13 True HEPA filter and Activated Carbon filter. Pre-filter works for hair, lint, dust, pet fur and other large particles; True H13 HEPA filter can attach 99.97% of particles 0.3 microns in size; Activated Carbon Filter absorbs smokes, cooking smells and pet odors. With this core 300 air filter, you can breathe the fresher air 3.[Exquisite Craft]This core 300 filter replacement for LEVOIT air purifier combined with fine non-woven and activated carbon fabric which adopt advanced lower energy consumption and lower density structure technology with higher efficiency and less pressure to ensure maximum filtration. The Core 300/ Core 300-P/ Core 300S/ Core 300S-P replacement filter also feature with energy saving, excellent performance and a longer life 4.[Cost-Effective]The package includes 2 Pack Core 300-P air filter, it perfect fits and works well for LEVOIT Core 300/ Core 300S air purifier. If you still suffered with air pollutants, you should need to replace for LEVOIT Core 300 Replacement Filter to improve the quality of indoor air. The most important, it much more affordable and saving much cost for your all-year-round air cleaning need