The following items are included in our Respironics Millennium Oxygen Concentrator Filter PM kits: 

It is recommended to replace your oxygen concentrator filters once a year. Our concentrator filter kits for the Respironics Millennium 5 liter oxygen concentrators include all of the filters that are part of the annual preventive maintenance including the foam pre-filter, foam cabinet filter, and compressor intake bacteria filter. Keep your oxygen concentrator running well by performing the easy and inexpensive task of performing routine maintenance and replacing filters every year.

MPN: FK-MILL