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 5990-01-326-2677
NSN 2925-01-519-3221
NSN 5930-01-585-9612
NSN 5855-00-761-6559
NSN 5996-01-369-4964
NSN 6645-00-539-1705
NSN 5910-00-504-7418
NSN 5990-01-009-1422
NSN 5920-00-175-7987
NSN 5945-01-076-9447
NSN 5985-01-415-6880
NSN 6320-01-113-7647