1. 100pcs bag, 100% high-quality non-woven fabric.<br> 2. Perfect fit-each screen measures 53 * 35mm, precisely matching your machine.<br> 3. Compatible with CPAP machines, suitable for AirSense 10 and AirCurve 10 to S9 series CPAP<br> 4. Ultra-fine PM2.5 ultra- dust filter cotton, which can effectively filter extremely fine dust particles (PM2.5 level) in the air, ensuring that you get and improve air quality during the use of the ventilator.<br> new and high quality.<br> Disposable ultra-fine filter blocks fine particles.<br> Effectively filter PM2.5 fine particle dust in the air.<br> White filter cotton is recommended to replace 1-2 pieces in .<br> Not only help you keep your lungs clean, but also prevent dust, dirt and other substances.<br> Specification:<br> Color: White.<br> Material: Non-woven<br> Size: About 53 * 35mm<br> Package Contents:<br> 100 * Filter membrane<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.