Fisher & Paykel FlexiFit HC431 Full Face CPAP Mask Assembly Kit - All Cushions (S, M, L) Included

HC432 and HC431 Compatibility

432 silicone cushion and foam cushion insert will not fit the 431 frame.

431 silicone cushions made after April 2006 will fit the 432 frame.

431 silicone cushions made before April 2006 will not fit the 432 frame.

If you are switching from the HC431 to the Flexifit™ HC432 mask, the sizes run a little smaller on the HC432.

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.

Where do I find the size?

The mask frame does not have an identifiable size because it offers a universal fit to each of the HC431 full face cushions.

To find the size of the cushion, turn the mask to look at the flat bottom of full face cushion. Large embossed letters spell out the words "S M A L L," "M E D I U M," or "L A R G E." The words are found near the rim connecting the mask frame to the full face cushion.

Glider Strap Variations

The original HC431 glider strap has a clip with a 2 point interlocking system. The newer HC431 headgear has a 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.