40 PIECES - package include 40 pieces of high quality filters. Great replacement for your CPAP. COMPATIBLE WITH CPAP MACHINES-the perfect CPAP air filters for any of your CPAP Machines from AirSense 10 and AirCurve 10 to S9 Series CPAP. THE -fit your machine precisely. FILTERING PERFORMANCE-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: white Material: sponges Size: 5.3*3.5cm Package Contents: 40 x filter cotton Only the above package content, other products are not included. Note: Light 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.