As differentiated by source control
An odorless, flexible, hollow item, without end coupling or a communication cable. It may be of single or multiple layer construction and may contain wire reinforcement. It is designed for use in low pressure breathing oxygen system, air line masks, and the like. Excludes hose, nonmetallic.
NSN 6320-01-458-1853
NSN 4140-01-573-6336
NSN 5990-01-591-8797
NSN 6320-01-341-9126
NSN 5905-01-282-7816
NSN 5855-01-088-8700
NSN 5999-01-252-9824
NSN 5930-01-084-8176
NSN 6620-01-054-9346
NSN 4140-01-011-6205
NSN 6150-01-329-8282
NSN 6220-01-384-3879