Fangrui Product Details 30pcs Cpap Ultra Fine Filters: Engineered To Block The Tiniest Particles Of Dust To Keep You Your Cpap Machine Healthier With Every Deep Breath Of The Freshest Air! The Fit And Filtration: Each Filter Measures 2 1/8 Inchx 1 7/16 Inch To Fit Your Machine Precisely. Each Filter Is Designed To Block Dust. Safe Easy Breezy To Use: Each Filter For Cpap Goes Beyond Filtering Harmful Mini Contaminants. Made Of High-quality Materials, Our Ultra Fine Filters Are Extremely Safe And Bisphenol-a Free. Youll Breathe Easier Than Ever Without Running The Risk Of Exposing Your Lungs To Any Type Of Allergies. No Chemical Smells Either. Just Beautifully Designed Filters That Are Extremely Easy To Change, Or Dispose Of. Clean Air For Healthier Life-our Filters Are Designed So As To Provide You And Your Loved Ones With The Cleanest Air! Wide Scope Of Application: The Size Of Cpap Filters Fully Fits Most Cpap Machines, Including All S9 Series, Airsense Aircurve Airstart Series Cpap Bipaps. Specification: