This combo pack will be enough to last the whole year so you will not have to worry about running out of filters for your Airsense MachineCOMPATIBLE WITH: This CPAP Filters are compatible with Resmed Airsense 10, Aircurve 10, Airstart and Resmed S9 SerieCPAP Filter Kit is filter kit fitting CPAP Machines,Fit with Various Resmed MachinesEach filter measures 2 3/32inch x 1 3/8inch (53mmx 35mm)to fit your machine precisely.Suggest replace your filter every two weeks. The consistent change of the air filter can prolongs the quality of your machine.Colour: whiteMaterial: cottonPackage Contents:80 x CPAP FiltersOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.