Features 1、Clean Hygienic: Using our unique replacement filters ensures that you can breathe clean, hygienic air while using the breathing machine, making your life more comfortable. 2、Suggestion: You had better replace the filter every 18 days, so that you can keep your breathing clean and hygienic in time, without too much dirt on it. 3、Sleep: After you use our supply filter, you can enjoy a quiet sleep and create a peaceful environment for your family, I believe you will be satisfied with the filter. 4、Scope Of Application: Our breathing machine accessory is suitable for ResMed Airsense 10, for Aircurve10, for Airstart 10, for ResMed S9 series standard breathing machine. 5、Quantity: Our disposable filters have a total of 20 pieces, which are large in number. Once used and played, they will be thrown away once, which is enough to use for one year. Specification Item Type: Replacement filters for ResMed Material: Cotton Scope Of Application: Suitable for ResMed Airsense10, for Aircurve10, for Airstart 10, for ResMed S9 series standard machines Package List 20 x Replacement Filters