HALF FACE RESPIRATOR. MODEL: ADVANTAGE 420; MAKE: MSA; 10102184: SIZE ”L”; FACE PIECE: LIQUID SILICONE RUBBER AND NYLON; YOKE:, POLYOXYMETHYLENE[POM]; HEAD HARNESS: POLYESTER [PES] AND LYCRA; INHALER VALVE:, NEOPRENE; EXHALATION VALVE:LIQUID SILICONE RUBBER; NECK BUCKLES:, POLYPROPYLENE [PP]; WEIGHT WITHOUT FILTERS:SIZE L: 157G; APPROVALS AND STANDARDS:, NIOSH,EN-140.