This combo pack provides a full year supply of filters, ensuring you won't run out for your Airsense machine. COMPATIBLE WITH: Resmed Airsense 10, Aircurve 10, Airstart, and Resmed S9 Series. This CPAP filter kit is 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 changes help maintain optimal machine performance. Color: White Material: Cotton Package Contents: 80 x CPAP Filters OR 60 x CPAP Filters The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color. Measurement error allowance is +/- 1-3 cm.