30 PREMIUM CPAP FILTERS - Designed to capture fine particles of dust and pollen, helping to maintain cleaner air for you and your CPAP machine. THE PERFECT FIT - Compatible with most CPAP machines, including S9 series, AirSense, AirCurve, and AirStart series CPAP and BiPAP devices. SUPER SAFE AND EASY TO USE - Each CPAP filter is made from high-quality, BPA-free materials to help filter out small contaminants. Enjoy clean, fresh air without chemical odors or allergens. Filters are simple to install, replace, and dispose of. EASY MAINTENANCE - For optimal performance, replace the filter every 3-4 weeks. Color: White Material: Cotton Size: 5.3 x 3.5 cm Package Contents: 1 set x 30 cotton filters Note: The package includes only the items listed. Other products are not included. Note: Screen display settings and lighting may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1-3 cm.