The manufacturer has stamped the part number (431 or 432) identifying the mask on the upright bar for the forehead support. The manufacturer did not include the alpha characters "HC" in front of the numeric characters.
The HC431 Full Face Mask Headgear is latex free, as are all other headgear by Fisher & Paykel.
The original HC431 headgear has a headgear clip with a 2 point interlocking system. The newer HC431 headgear has a headgear clip with a slim indention used to interlock the headgear to the mask.
Please Note: The 2 point interlocking system headgear is only compatible with the original style mask. The newer HC431 headgear is intended for the newer mask only. The mask and headgear cannot be interchanged.
Do you have a guide to help me choose the right mask?
Yes, we created a Help Me Choose guide to help you select the right mask or machine according to your preferences. The guide asks you a series of questions regarding your preferences and your facial features. Based on your answers we provide you with a comparison chart of the masks that meet your criteria. Get started here:
While you may find the information provided on this site helpful, please understand that it is not in any way intended to replace
the advice of a physician or medical professional. If you're concerned about your health or worried about specific symptoms,
please consult a doctor. If you have additional questions about our site, please consult our
for more information.