Usage Tips:[ Compare With ] For Core 400S Filter Replacement compatibles with for Core 400S 400S-RF air purifier. Fit for your air purifier.[ Why Us ] Perfect size, , low noise, same technology and less cost. for Core 400S filter replacements will be a worthwhile investment.[ How Does The Filter Work ] The for Core 400S replacement filter contains H13 True HEPA Filter, Activated Carbon Filter and Nylon -filter. It will capture 99.97% of particles as small as 0.3 micrometre and eliminate odor, VOCs and other smell in your home.[ How To Work Perfectly ] Replace for Core 400S filter replacement 12 months, , according to your using frequency and the environment. Easy to change, no tools required.Colour: whiteMaterial: plasticPackage Contents:1 * Filter Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.