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Foam Diffusers for Various FlexiFit & Oracle CPAP Masks - 10 Pack

  •  $5.95

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These Diffuser Filters are for use with the Diffuser Elbow available for all FlexiFit 405 (HC405), FlexiFit 406 (HC406), and FlexiFit (HC407) Nasal CPAP and BiPAP masks, and all Oracle (HC451 & HC452) Oral CPAP & BiPAP Masks.

The Foam Diffuser fits in the elbow, beneath the filter cap, when in use. Each pack includes 10 Foam Diffusers. Diffusers should be changed regularly when soiled.


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Manufacturer Fisher & Paykel
Part Number(s) 900HC439
HCPCS Insurance Code E1399
Typical Country of Origin New Zealand, Mexico

Foam Diffusers for Various FlexiFit & Oracle CPAP Masks - 10 Pack

4 out of 54 out of 54 out of 54 out of 54 out of 5
Two Sides are different
Written By: R.K., Dallas, Tx 3/3/2016
At first I thought these were inferior to the one that came with the mask diffuser elbow. When I used one for the first time, it was quite noisy. I ended up putting two in to make it quieter. But when I looked at them again the next time, I saw that the two sides of it were slightly different. One side is harder and the other side is fluffier. I tried it both way and found out that if the hard side faces out it's pretty quiet. If the hard side faces in, it's quite noisy when I breath. Hard to believe that little difference makes such a big change in sound. I downgraded it one star because I think it should have been printed on the bag or posted in the instructions. Other than that, they are "very good"

5 out of 55 out of 55 out of 55 out of 55 out of 5
Hard to find item for CPAP.
Written By: Charlibart, Hewitt, TX 6/28/2015
I have only lately started using a mouth breathing CPAP mask (Oracle 452). Because of the location of the diffuser it needs changing more frequently. I was at a loss to find this small item until I checked the Direct Home Medical site. They responded promptly and now I have a reliable source.

5 out of 55 out of 55 out of 55 out of 55 out of 5
Exact replacement
Written By: K Kenney, Arnold, Maryland 3/19/2014
The item was received via USPS less than a week after I placed the order. It was an exact replacement for the ones on my CPAP mask.

5 out of 55 out of 55 out of 55 out of 55 out of 5
Does the job!
Written By: Mark, Ohio 3/18/2014
Good filters, nice price too :)

3 out of 53 out of 53 out of 53 out of 53 out of 5
Not quite right
Written By: Bonuseventus, Ava, MO 2/3/2014
Correct material, but wrong cut. I can use them, I will just need to field modify for fit.

5 out of 55 out of 55 out of 55 out of 55 out of 5
Foam diffusers
Written By: J. Maker, Edmond 2/27/2013
These are great!!!!!

5 out of 55 out of 55 out of 55 out of 55 out of 5
Written By: May, Maryville 7/26/2012
I was reluctent to order before, because these filters looked nothing like those I have been using. The change in picture made it easier to decide. I am very pleased with the speed of delivery and the quality of purchase.

View Popular Sleep, Oxygen & Asthma Therapy Search TermsParts for CPAP Masks & BiPAP MasksSleep Therapy Products by Fisher & Paykel Healthcare All Oracle 452 Oral CPAP Mask PartsAll FlexiFit 405 Nasal CPAP Mask PartsAll FlexiFit 406 Petite Nasal CPAP Mask PartsAll FlexiFit 407 Premium Nasal CPAP Mask Parts


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