Nispira CPAP Inline HEPA Filters, Compatible with BiPAP and CPAP Machines, Fit DreamStation Standard Tubing (22mm) and Machine Outlet (25mm), 3 Pack

["Important: We encourage buyers to verify the inlet and outlet sizes to ensure compatibility with your CPAP device and tubing before purchasing.","Easy Installation: Simply connect the filter between the CPAP tubing (standard) and machine outlet for immediate use.","Effective Filtration: With a low flow resistance of approximately 5.6 mmH2O at 30 LPM, it promotes not to impact the performance of your machine, maintaining optimal airflow and ensuring uninterrupted session throughout the night","Versatile Compatibility: Compatible with some of the models from ResMed, Dreamstation, and other popular CPAP/BiPAP machines. These inline filters have 22 mm OD/ 17 mm ID on one (Tubing) end and 25 mm OD on the other (Machine) end. It fits standard tubing with outlet size 22mm. For installation with heated tubing, please see note below","Heated Humidification Notes: Some users find that using it can reduce pressure and air flow in humidified machines. If you experience reduced pressure when using a filter with a humidifier, remove the filter and allow it to dry out completely before re-installing on your system or discontinue use completely"]