Meets niosh/msha approval for intrinsically safe apparatus, for face mask p/n 336-890-083
NSN 5985-01-581-4410
NSN 6610-01-077-6783
NSN 6135-01-343-7093
NSN 5985-01-527-8824
NSN 6610-01-476-7412
NSN 5895-00-488-5187
NSN 5960-00-839-8137
NSN 5930-00-817-7336
NSN 6320-00-636-0922
NSN 5895-01-453-6606
NSN 6150-01-411-5216
NSN 6240-00-290-4185