Sole source required by statute 6.302
The portion of a mask, air line; mask, chemical-biological; mask, gas; or other breathing equipment mask that partially or completely encloses the user's face.
NSN 6645-00-232-4070
NSN 5925-01-381-2528
NSN 5996-01-476-2131
NSN 5835-01-242-9806
NSN 6130-01-227-7074
NSN 6105-01-297-9977
NSN 6240-01-633-9357
NSN 5975-00-314-6811
NSN 4140-01-596-9799
NSN 4140-01-203-7635
NSN 6620-00-170-5296
NSN 5895-01-352-8774