This combo pack provides a full year 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 set 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 the filter every two weeks. Regular filter replacement helps maintain the performance and longevity of your machine. Color: White Material: Cotton Package Contents: 80 x CPAP Filters Only the items listed above are included; other products are not part of this package. Note: Light reflection and differences in display screens may cause slight variations in color between the product image and the actual item. Measurement error allowance is +/- 1-3 cm.