[PRODUCT SPECIFICATIONS]: This high-efficiency Core 300 air filter replacement captures 99.97% of airborne particles and odors, suitable for households with pets, cooking, and smoke exposure. It is recommended to replace the filter every 6-8 months. [REPLACEMENT PART NUMBER]: Core 300 air filters are compatible with Core 300 air purifiers and Core P350 air purifiers. Part numbers: Core 300-RF and Core P350-RF. It is recommended to replace filters every 6-8 months. [QUALITY]: Air purifier replacement filters help improve air quality and reduce odors for a cleaner, healthier breathing environment year-round. For optimal performance, use genuine replacement filters. Each air purifier is tested as a complete system with its filter to ensure maximum efficiency. Color: White Material: Plastic Package Contents: 2 x HEPA filter, 1 x cleaning brush Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight variations in color between the image and the actual product. Measurement may vary by +/- 1-3 cm.