1. Fully Compatible with LEVOIT Core 300 Air Purifier - 2 Pack Core 300 Air Purifier Replacement Filter 7.5 x 7.5 x 5.7 inches, compatible with LEVOIT Core 300, Core 300S, Core 300-RF, Core P350, and Core 300-RAC Air Purifiers. Contact the seller if any issues arise; support is available for assistance. 2. Traps Unpleasant Odors - Features a 200g activated carbon layer with 5MM thickness high-density filter material, enhancing odor removal by 50%. Effectively reduces pet odors and household smells without causing secondary pollution. 3. H13 Grade True HEPA Filter - Utilizes HEPA technology to capture 99.7% of airborne particles as small as 0.25 microns, including dust, smoke, pollen, pet dander, and allergens. 4. 3-Stage Filtration System - 2 Pack replacement filters with a 3-in-1 design: (1) Nylon Pre-Filter, (2) H13 Grade True HEPA Filter, (3) Activated Carbon Filter.