3m h7a ear muff 27db over the head black green
ear muff noise reduction rating nrr 27db earmuff style over the head black green dielectric no standards ansi s3 .19 1974 br b features b ul li color black green li li features protection at extreme high and low frequency levels stainless steel headband with wide padded head cushion patented liquid foam ear cushions li li item ear muff li li type over the head li li dielectric no li li standards ansi s3 .19 1974 li li noise reduction rating nrr 27db li li ear muff style over the head li ul
3m