Meets niosh/msha approval for intrinsically safe apparatus, for face mask p/n 336-890-083
NSN 5965-00-431-2492
NSN 6645-01-211-6502
NSN 6320-00-004-9158
NSN 6620-01-083-7796
NSN 6320-00-925-0558
NSN 5999-01-433-2811
NSN 5996-00-361-9901
NSN 6145-01-525-7611
NSN 5920-00-581-1355
NSN 6620-00-706-2481
NSN 6135-01-312-1040
NSN 5965-01-449-1101