An item designed to be fitted over the nose to prevent escape of air during expiratory volume measurement.
NSN 5998-01-459-8449
NSN 5950-00-110-9299
NSN 5895-01-023-0522
NSN 6620-01-661-2700
NSN 6240-01-319-2549
NSN 5930-01-504-1281
NSN 4140-01-055-6355
NSN 5998-00-153-3335
NSN 6150-00-246-6673
NSN 5905-00-934-2872
NSN 6135-01-422-1440
NSN 6620-01-527-3326