Usage Tips: This combo pack provides a year's supply of filters, ensuring you won't run out for your Airsense machine. COMPATIBLE WITH: These CPAP filters are compatible with Resmed Airsense 10, Aircurve 10, Airstart, and Resmed S9 Series. This CPAP filter kit is a disposable filter kit designed to fit various Resmed CPAP machines. Each filter measures 2 3/32 inches x 1 3/8 inches (53mm x 35mm) for a precise fit. It is recommended to replace your filter every two weeks. Regular replacement helps maintain the performance and longevity of your machine. Color: White Material: Cotton Package Contents: 80 x CPAP Filters Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.