40 PIECES - Every package include 40 pieces of high quality filters. Great replacement compatible with your CPAP.COMPATIBLE WITH VARIOUS CPAP MACHINES-the perfect CPAP air filters compatible with any of your CPAP Machines from ResMed AirSense 10 and AirCurve 10 to S9 Series CPAP.THE PERFECT FIT-fit your machine precisely.EXCELLENT FILTERING PERcompatible withMANCE-These filters are made of ultra-fine spinning fiber cotton, effectively filter fine particles, dust, and pollen.Only package content, other products are not included.Colour: whiteMaterial: spongesSize: 5.3*3.5cmPackage Contents:40 x filter cottonOnly the above package content, other products are not included.Note: Light shooting 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.