Compatible with: The AP-T40 Compatible with the Homedics TotalClean 3-in-1 HEPA-Type Air Purifiers, models AP-T40FL, AP-T40WT, AP-T40WTAR, AP-T45WT, AP-T45BK and Costco Model 1461901. Please find your machine code on the bottom of the machine before purchasing.（Not fit for AP-T20/AP-T30/AP-PET35!!!） 3-in-1 Filtration: AP-T40FL Replacement Filter use 5 layers 3-Stage Filtration(Fine Pre-Filter, Grade True HEPA Filter and Activated Carbon Filter), keeping fresh and air in your household 360° Effective Filtration: AP-T40 Filter Replacement for Homedics TotalClean HEPA-Type Air Purifier Filter. This helps improve air quality and provides you with fresh air, ideal for improving your quality of life AP-T45 REPLACEMENT FILTER PACK: The AP-T45 replacement filter is made of high quality materials. You will receive a value pack of 2. The AP-T45 filters are easy to replace without the need for any additional tools, ensuring that you can replace your old filters in minutes. For optimal performance, it is recommended that the HEPA filter be replaced every 6-12 months, depending on usage and environment After-Sales Service: The AP-T40 filter is easy to be replaced without any other tools.It doesn't take much time. And if you have any problems during the purchase process, please feel free to contact us 2 x AP-T40 Filter Replacement