Meets niosh/msha approval for intrinsically safe apparatus, for face mask p/n 336-890-083
NSN 7035-00-529-3128
NSN 6150-00-489-8285
NSN 5930-00-949-3655
NSN 6220-01-500-1857
NSN 6645-00-061-1885
NSN 5910-00-432-0268
NSN 6645-01-496-0073
NSN 6145-00-419-0550
NSN 5960-01-599-9821
NSN 4140-01-627-3930
NSN 5975-01-043-0782
NSN 6110-01-464-3375