Filters for Fisher & Paykel SleepStyle 200, 233, 234, and 600 Series, 4 pack

Good quality and price with no unexpected issues.

Item is as described and will probably order more.

Looks smaller than the ones I used to have but works fine.

According to the operating manual for my Fisher & Paykel 200 series CPAP, the correct part number for the small air filter at the rear of the device is "900HC240". Searching on Amazon for that part number led me to this page, and I ordered this package of 4 filters.I agree with some of the other reviewers who say that the price is high for such a simple piece of filter material, but it seems that it is difficult to easily find a different source and also have some confidence that the filter will be of the right size and material. I really don't think that it is so very critical to get precisely the same filter material and surely there are other similar materials easily available that would work just as well, probably even larger sheets of material that could be cut to provide a bunch of these smaller sizes. If I do figure out how to do that, then I'll add a note here to this post and report on what I did learn.In the meantime this works fine and is not too badly priced, and it really is a good idea to replace the filters often enough to avoid bringing in dirty air into the machine, and also to avoid the filter becoming clogged up which would restrict airflow and also possibly damage the machine.

Very simple pack of replacement air filters for the Fisher and Paykel Sleepstyle CPAP machines. Clean air is a must, best not to breathe the dust!