Dual-ear design saves time by measuring both ears simultaneously in under five seconds

3/16in (5mm) diameter marine grade 316 stainless steel shackle for superior corrosion resistance

134 including training

-Delivered within 1-3 business days (Peninsula)

composite toe cap

3M™ E-A-Rfit™ Dual-Ear Validation System 393-1100 3m safety glasses Dual-ear design saves time by3M Product Number 393 1100, 3M ID 70071674116, UPC 00051141567648 Details Dual element, dual microphone assembly is the key to the system, measuring sound levels inside and outside the hearing protector Science based, quantitative testing gives accurate reports of hearing protection Fast, clear, accurate results are obtained in just seconds and can be printed or saved electronically for future reference System determines personal attenuation rating