COMPATIBILITY: The LP350 Replacement Filter is compatible with the LivePure Aspen Series LP350TH and LP350THP Air Purifier, fits model LP350TH, LP350THP, LP350TH-WHT, LP350TH-BLK, LP350THP-WHT & LP350THP-BLK; Replaces part number LP-HF350 &LP-PF900. 1 True HEPA Filter & 4 Carbon Pre-Filters: Premium H13 grade true HEPA filter filters 99.97% of particles down to 0.3 microns in size, such as dust, pollen, smoke, odors and pet dander, creating fresh and purified air for your family. Regular Replacement: To achieve optimal performance, please replace the filter regularly to keep your machine fresh and clean. For best results, remove the filter once a month and clean it gently with a soft brush or vacuum. Simple Installation: Change the BreshAir replacement filter in a minute, no tools required. Note: please remove the new filter from the plastic bag before placing it into the machine. Customer Care: We're committed to providing excellent service. If you are not satisfied with the product, you can apply for a refund at any time and get 100% satisfactory service. LP350 True HEPA Replacement Filter for LivePure Aspen Series LP350TH and LP350THP Air Purifier, includes 1 H13 HEPA Filter and 4 Pre-Filters, Part # LP-HF350 & LP-PF900