These filters manufactured by Fisher and Paykel are white fiber filters. They are 2.75 inches long by .75 inch wide. Filters in your CPAP machines are a very important part of your sleep therapy as they serve to remove dust and pollen particles. These filters can be changed when discolored or soiled.
If you are unsure of the proper fit just give The CPAP People a call!
These filters are compatible with the following Fisher and Paykel CPAP Machines: HC231, HC232, HC233, HC234, HC254, HC600 and HC604.