33 cubic feet, 20.9%o2/n2
A predetermined mixture of 2 or more gases in which each component is measured to extreme accuracy and its contents certified. It is normally used to standardize and assure the accuracy of highly sensitive laboratory equipment.
NSN 6320-01-161-6640
NSN 6240-01-080-9620
NSN 5985-01-335-6646
NSN 5910-01-475-4851
NSN 5905-01-483-7134
NSN 5925-01-080-2484
NSN 5895-00-543-1584
NSN 6220-01-196-5189
NSN 6105-00-165-1619
NSN 5855-01-422-4720
NSN 5935-01-631-4014
NSN 5985-01-394-5223