Compatibility:
The reusable pollen filters are compatible with all Philips Respironics DreamStation series CPAP/APAP/BiPAP devices.
Dimensions: 5.5cm x 2.3cm (55mm x 23mm)
!!! We recommend that the pollen filters should be cleaned at least once every 30 days under a stream of warm water and replaced no more than every 6 months (or sooner if they show signs of damage).
The package contains one filter.