30 PREMIUM CPAP HYPOALLERGENIC FILTERS - Designed to capture fine particles of dust and pollen, helping to maintain cleaner air for you and your CPAP machine. COMPATIBLE WITH MOST CPAP MACHINES - These filters are designed to fit a wide range of CPAP and BiPAP devices, including S9 series, AirSense, AirCurve, and AirStart series. SAFE AND RELIABLE PERFORMANCE - Made from high-quality, hypoallergenic materials, these filters are free from Bisphenol-A and chemicals that may cause irritation. They help provide clean airflow without unpleasant odors. Simple to install, replace, and dispose of. EASY MAINTENANCE - For optimal performance, replace the filter every 3 to 4 weeks. Color: White Material: Cotton Dimensions: 5.3 x 3.5 cm Package Contents: 8 sets x 30 cotton filters (240 total filters) Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the product image and the actual item. Measurement error allowed is +/- 1-3 cm.