ITEM NAME:20Pcs/Bag Disposable Universal Replacement Filters For S9/S10 Resmed Airsense OZ Feature: For the perfect disposable CPAP air filters for any of your CPAP Machines from ResMed AirSense 10 and AirCurve 10 to S9 Series CPAP. Each filter is a combination of material engineered to block PM2.5 fine particles and large particulate matter, so you can breathe easy. Our filters are designed so as to provide you and your loved ones with the cleanest air to maintain the health of your lungs and keep the potential diseases away from you. Just to be given 1 or 2 filters a month. Order 20 filters and be able to change them frequently to live a healthy safe life style! Description: Type:Replacement Filters Color:White Size:approx.5.2*3.5cm Quantity: 20Pcs Weight:about 10g (1cm=10mm=0.39inch) Measurement Details in the attached picture. Package Included: 20Pcs Universal Replacement Filters (NOT included the machine) Notice: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight deviation for the measurement data. 3.Please allow 1-3cm error..Quantity: 20Pcs. Just to be given 1 or 2 filters a month. Order 20 filters and be able to change them frequently to live a healthy safe life style! Our filters are designed so as to provide you and your loved ones with the cleanest air to maintain the health of your lungs and keep the potential diseases away from you.