The replacement Exhalation Elbow for the HC406 and HC407 is made of molded plastic and connects the mask frame to the hose, and also serves as the primary noise diffuser. The elbow should be replaced if it's damaged or cracked in order to keep your CPAP mask working like new.
This Exhalation Elbow is a perfect match for the HC406 and HC407 Nasal Masks.
This part was easy to attach, it fit perfectly and was easy to order. I am 100% satisfied with my purchase.
The swivel idea is great, but the little fingers that hold it in broke off. Hence my need to replace.
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