JANDY 1.5" 2" & 2" 2.5" NeverLube Valve Diverter Kit 4720 Mega LBD or hydrogen sulfide as well hard hats safety helmets or hydrogen sulfide as well as non oil and oil particulates at concentrations up to 10 times the Permissible Exposure Limit (PEL) with half facepieces or 50 times PEL with full facepieces Full facepieces must be quantitatively fit tested to claim assigned protection factor above 10 in negative pressure mode Not for use in environments that are immediately dangerous to life or health (IDLH) Two point suspension and wire headband with individual spring action help facilitate constant 5" NeverLube Valve Diverter Kit 5" 2" & 2" 2