Compatible replacement filter for Levoit Core 400S and 400S-RF air purifiers. Designed to fit seamlessly in your air purifier for optimal performance. High-quality replacement filter offering the same technology as the original, with perfect sizing, low noise operation, and reliable filtration. A cost-effective choice for maintaining clean air in your home. The replacement filter features a H13 True HEPA filter, activated carbon filter, and nylon pre-filter. It captures 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, smoke, and pet dander, while reducing odors, VOCs, and household smells. For best results, replace the filter every 12 months, depending on usage and air quality conditions. Installation is simple and requires no tools. Color: White Material: Plastic Package Contents: 1 x Filter Note: Lighting and monitor settings may cause slight color variations between the image and the actual item. Measurement tolerances may vary by +/- 1-3 cm.