This combo pack be enough to last the whole year so you not have to worry about running out of filters for your Airsense Machine COMPATIBLE WITH: This CPAP Filters are compatible with Airsense 10, Aircurve 10, Airstart and S9 Serie CPAP Filter Kit is disposable filter kit fitting CPAP Machines,Fit with Machines Each 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: white Material: cotton Package Contents: 80 x CPAP Filters Only 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.