About the product Versatile Compatibility: Compatible with ResMed, Dreamstation, and other popular CPAP/BiPAP machines, these inline filters fit 22mm tube outlets and 25mm machine inlets.Convenient Pack: Includes 12 disposable filters for easy replacement and extended use. Each filter is sanitized to ensure cleanliness and is individually packed and sealed to prevent contamination from exposure to air.Effective Filtration: Traps dust, pollen, and other airborne particles, ensuring cleaner air delivery to the user.Easy Installation: Simply connect the filter between the CPAP tubing and machine outlet for immediate use.Compact Design: Streamlined profile allows for discreet and unobtrusive use during sleeping time.Replacement: It is advisable to replace the CPAP inline filter every 30 days most or when there are visible signs of discoloration, accumulation of debris, or a noticeable reduction in airflow to ensure optimal performance.