30 PREMIUM CPAP FILTERS - Engineered to block the tiniest particles of dust, allergens & pollen to keep YOU & your CPAP machine healthier with each of essentially the most up to date air! THE - Great news: on your peace of mind, the scale of CPAP filters completely suits most CPAP machines, including all S9 series, AirSense AirCurve & AirStart sequence CPAP & BiPAPs. SUPER SAFE & EASY BREEZY TO USE - Each filter out for CPAP goes beyond filtering risky mini contaminants. MADE of nice materials, our Filters are extremely secure and Bisphenol-A free. You'll breathe simpler than ever without running the chance of exposing your lungs to any variety of allergies. No smells either. Just superbly designed filters that are ultra clean to change, replace or dispose of. EASY USE - Fits maximum machines, simply replace filter out each 3-4 weeks to a , wholesome sleep. colour: white Material: cotton size: 5 x three Package Contents: 1 set x 30 filter out cotton Only the above package content, different merchandise should not included. Note: Light and diverse exhibits may cause the color of the object in the picture a bit of different from the genuine thing. The measurement allowed error is +/- 1-3cm.