3m ear plugs uncorder es 01 001 pack of 250 pairscomplies withce certifieden 352 2 and reduces noise levels by 36 db tapered design offers superb fit for a wide range of ears.advanced soft foam with a smooth texture for all day comfort.ideal for use ... Delta plus conic200 carton of 200 sets of earplugscomplies withen352 2 hearing protection'. '.strtoupper('s')nr 37 db standard noise reduction'. '.strtoupper('h') 36 high frequency attenuation'. '.strtoupper('m') 34 medium frequency attenuation'. '.s... Venitex conicco200 carton of 200 corded earplugsconforms to en352 2 snr 37 db standard noise reduction h 36 high frequency attenuation m 34 medium frequency attenuation l 33 low frequency attenuationansi s3.19 1974 american national standards institu... Peltor e.a.r classic ear plug box of 250 pairs'. '.strtoupper('c')onforms to en352 2 snr 28 manufactured from a soft energy absorbing polymer foam'. '.strtoupper('t')he special closed cell structure of the foam allows the plug to expand gradually all... |