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 2 True HEPA Filter & 8 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 LP350 True HEPA Replacement Filter compatible with LivePure Aspen Series LP350TH and LP350THP Air Purifier, includes 2 H13 HEPA Filter and 8 Pre-Filters, Part # LP-HF350 & LP-PF900