Core 350 replacement filter: Developed exclusively for the Levoit Core 350 air purifier to maintain its top performance. With an affordable price to save many costs on your year round air cleaning needs. It is recommended to replace the filters every 6-8 months.Improved pre-filter: The new fine fleece pre-filter is more effective than other common pre-filters at catching hair, animal hair, smoke and dust. Build the powerful first barrier to protect your health and that of your pet with the for LEVOIT Core P300-RF.True HEPA technology: Use an H13 grade True HEPA filter that meets the High-Efficiency Particulate Air (HEPA) standard. It filters the fine suspended particles such as animal hair, dust mites and pollen and thus helps effectively to alleviate allergies.Trap large particles: The ultra-fine nylon prefilter traps large particles such as dust, lint, fibers, hair and animal fur, which is also helpful in maximizing the life of the filter.Trap household odors: High quality granular activated carbon filter absorbs physically undesirable odors and vapors such as smoke, cooking odors and pet odors, and filters out volatile organic compounds (VOCs), perfect for households with pets, cooking and smokers.Colour:WhiteMaterial:plasticPackage Contents:1 * filter1 * Cleaning brushOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.