[ Compare With The One ] Replacement filter compatible with Levoit Core 400S and 400S-RF air purifiers. Designed to fit your air purifier model. [ Why Choose Us ] Precision fit, high quality, low noise operation, and cost-effective performance. Our replacement filters offer reliable air filtration for your home. [ How Does The Filter Work ] This 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 and helps reduce odors, VOCs, and household smells. [ How To Work Perfectly ] Replace the filter every 12 months, depending on usage and environmental conditions. Installation is simple and requires no tools. Color: White Material: Plastic Package Contents: 1 x Filter unit Note: This package includes only the items listed above. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement tolerance is +/- 1-3 cm.