Bullet Point: 1. Super clean air - The filter will actively clean the air when the CPAP or BIPAP machine leaves, and work with the machine built into the filter to provide exceptionally clean air at night. 2. Essential for allergy sufferers - Our cpap / bipap filter is a great choice for sleep therapy users prone to getting sick or allergic. 3. Maintain strong airflow - Low airflow resistance means users can maintain strong airflow for cpap / bipap machines. 4. Simple installation - The filter for CPAP / BIPAP machines is easy to install and easy to replace-just install the filter between the machine's air inlet and the standard CPAP pipe. 5. Disposable filters - Our filters can be used for an average of 4-6 weeks before they need to be replaced, however, depending on environmental conditions, your filters can be used for longer or shorter periods. Whenever white filter material begins to become dirty, they must be replaced. Descriptions: Essential for allergy sufferers: For sleep therapy users who are prone to illness or allergies, an online bacterial virus filter is a good choice. When the air leaves the cpap or bipap machine, they actively clean the air and work with the machine built into the filter to provide exceptionally clean air throughout the night. Safe, convenient and convenient: These universal in-line filters are naturally hydrophobic for maximum filtration with minimal air loss. Our universal filter is easy to install and does not require recalibration on most CPAP machines. Just connect the filter to the machine between the air inlet and the standard cpap pipe. After that, turn on the machine and constantly enjoy the clean, pure, delicious air. Specifications: Size: 7x5cm/2.75x1.96inch(Approx.) Gram weight: 2 grams Material: environmentally friendly materials Uses: filtration Package included: Filter * 1