This is the white Ultra Fine disposable filter for use with the Devilbiss IntelliPAP 2 Auto CPAP Machine:  These disposable Ultra Fine Filters come 2 per pack.

• The Ultra Fine Filters are an essential component to your CPAP therapy due to their ability to remove irritating dust and pollen particles from the air

• The filter should be checked every 10 days and replaced as necessary. The filter is located in the rear of the device.

• Install the Ultra Fine White filter behind the Black Foam filter