These original Philips Respironics brand foam pollen filters (with integrated blue carrier as shown) are designed for use with all DreamStation Series CPAP/BiPAP Machines. Foam pollen filters are reusable and should be cleaned on a regular basis and replaced as needed due to wear and tear.
Dimensions: Approximately 2.25 x 1.00 Inches in an irregular trapezoid shape.
Usage Information: The blue plastic carrier is permanently attached to the filter. It should not be detached.