Enhanced Breathing Experience: Our CPAP filters are designed to block over 99.99% of harmful particles, ensuring that only clean air reaches your lungs. This advanced filtration technology helps maintain a healthy respiratory system, especially during sleep. Optimal Airflow for Comfort: CPAP filters are engineered to not restrict airflow, ensuring that you can breathe easily and comfortably throughout the night. If you experience any difficulty in breathing, simply adjust your machine's airflow settings for immediate relief. Universal Compatibility: These filters are universally compatible with all standard and heated CPAP tubing. Regular Replacement for Maximum Efficiency: To maintain the highest air quality, replace filters every 3-4 weeks depending on environmental conditions. Regular replacement helps capture more impurities and enhances the overall effectiveness of your CPAP machine. Installation Advice for Heated Tubing: If you use heated tubing, do not connect the filter directly to the machine. Instead, attach the filter between the silicone end of the heated tubing and the mask for proper functioning and to maintain device integrity. Quantity: 9PCS Color: Transparent Material: Plastic Package Contents: 9 x Inline CPAP Filters Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowed error is +/- 1-3 cm.