Meets niosh/msha approval for intrinsically safe apparatus, for face mask p/n 336-890-083
NSN 6110-01-327-4109
NSN 5925-01-616-9963
NSN 5960-00-734-1828
NSN 5996-01-226-0606
NSN 5935-01-228-0718
NSN 5945-01-445-6883
NSN 5905-01-443-3551
NSN 5950-01-521-7575
NSN 6620-01-656-5766
NSN 5895-01-452-2410
NSN 6240-01-101-7362
NSN 5935-01-653-2217