1. 100pcs bag, 100% high-quality non-woven fabric.2. -each screen measures 53 * 35mm, precisely matching your machine.3. Compatible with various CPAP machines, suitable for AirSense 10 and AirCurve 10 to S9 series CPAP4. Ultra- PM2.5 ultra-clean dust filter cotton, which can effectively filter extremely dust particles (PM2.5 level) in the , ensuring that you get clean and improve quality during the use of the ventilator.Brand new and high quality.Disposable ultra- filter blocks particles.Effectively filter PM2.5 particle dust in the .White filter cotton is recommended to replace 1-2 pieces in 1 month.Not only help you keep your lungs clean, but also prevent dust, dirt and other substances.Specification:Color: White.Material: Non-wovenSize: About 53 * 35mmPackage Contents:100 * Filter membraneOnly the above package content, other products are not included.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.