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 5999-01-576-5870
NSN 6150-01-170-6968
NSN 5855-01-315-6180
NSN 5965-01-127-3890
NSN 7035-01-090-3369
NSN 6650-01-467-8818
NSN 6135-00-553-7995
NSN 5905-01-485-3050
NSN 4140-00-725-7023
NSN 5920-00-847-6370
NSN 5990-01-426-7350
NSN 4140-01-052-7400