3M E-A-Rsoft 073-781 - 073-78 E-A-Rfit Microphone Assembly1/Cv 7100077867 Thickness_.020 Inch 3M Rugged Comfort Half Facepiece

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3M E-A-Rsoft 073-781 - 073-78 E-A-Rfit Microphone Assembly1/Cv 7100077867 Thickness_.020 Inch 3M Rugged Comfort Half Facepiece3M E A Rfit Dual Ear Microphone Assembly, 073 781, assorted The 3M E A Rfit Dual Ear Microphone Assembly works with the 3M E A Rfit Dual Ear Validation System to help employers determine whether workers are receiving adequate hearing protection from their hearing protector The complete system issues a pass or fail rating for each individual based on the employee's personal attenuation rating (PAR) Each dual element microphone connects to probed test