"Unissued MS22001 Oxygen Mask, This mask is assembled from unissued parts. Original boxes for the mask and hose are included for size medium masks. Box for the MC-3A fitting is not included. The mask comes a Y strap connector so you can attach the oxygen mask to any flight helmet or retension assembly with oxygen mask snaps. You can also choose an optional oxygen mask microphone assembly with cord and plug. "
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