[PRODUCT SPECIFICATIONS]: This high-efficiency Core 300 air filter replacement captures 99.97% of airborne particles and odors. It is suitable for households with pets, cooking activities, and smoking. It is recommended to replace the filter every 6–8 months. [REPLACEMENT PART NO.]: Core 300 air filters are compatible with LEVOIT Core 300 and Core P350 air purifiers. Part numbers: Core 300-RF and Core P350-RF. It is recommended to replace the filter every 6–8 months. [QUALITY]: Air purifier replacement filters help improve indoor air quality and neutralize odors for a cleaner, healthier breathing environment. For optimal performance, use only replacement filters. Each air purifier is tested as a complete system with its designated filter to ensure maximum efficiency. Color: White Material: Plastic Size: 193 × 150 mm Package Contents: 1 × Air purifier filter 1 × Brush