Features: Inline filters are another line of defense against bacteria, viruses, and allergens. These defenses are often related to CPAP / BiPAP use. The air entering your CPAP / Bilevel machine is filtered through the machine inlet filter. Our inline filter is placed on the CPAP exhaust pipe and connected to your pipe to filter the air again into your pipe and mask. Our Bacteria Filter material removes 99.99% of air pollutants. When multiple people use CPAP machines, inline filters are clinically recommended. Many CPAP users find that enhanced filtering helps reduce the incidence of vicious infections and other nasal inflammations. Use inline filters to enhance the built-in filtering capabilities of the internal CPAP machine filtering system. The inline filter is housed in an acoustically sealed plastic frame and is therefore glue-free. It can be used with humidifier. A must for all CPAP / BiPAP machine users – especially those who are allergic! Specification: Name: Ventilator Filter Material: environmentally friendly material Color: white filter Uses: bacterial virus filtration Packing List: Filter*1 Note: 1. Disconnect the pipe from the air outlet and connect the filter to the outlet opening. 2. Reconnect the tube to the other end of the filter, and place the filter firmly between the machine and the tube. 3. Use the machine according to the routine, the filtering effect is better. 4. Change the filter regularly according to the airborne particle size. 5. When a computer is used by multiple users, the filter should always change between uses.