These are the replacement filters for the Fisher & Paykel ICON Series CPAP Machines, including the ICON Premo, ICON Auto, and ICON Novo.
The filters are tapered in design. The filter measures 3/4" on one end and 1/2" on the other, with the total length at 2". See the complete dimensions in the picture.
These filters are not washable. The filters should be replaced every 3 months, or as needed.
Installation note: The black line on the filter faces the machine.