Disposable Filters for ResMed S9 and AirSense 10 CPAP Machines, 2pk (#36851). The S9 line of CPAP machines do not use reusable foam and disposable fine filters - like other machines. This standard filter helps keep large particle matter, like dust balls and hair, out of your machine. For additional filtering, you can purchase the improved Hypoallergenic Filters found elsewhere on our site.

Features

Filter Features

• These disposable standard filters measure approximately 2 1/8" L x 1 7/16" H