Hearing Protection Fit Testing 3M E A Rfit Dual Ear Enclosure Assembly Speaker 073 783 Tyvek 400 Slightly longer than regular size Slightly longer than regular size 3M™ E A R™ Classic™ Earplugs for higher noise reduction when fit deeply in the earcanal 5025 Inner and outer jackets CSA Z96 15 Class 1 Level 2 and ANSI ISEA 107 15 Class 1 Type O 3M™ E A Rfit™ Dual Ear Enclosure Assembly Speaker works with the 3M™ E A Rfit™ Dual Ear Validation System to help employers determine whether workers are receiving adequate protection from their hearing protector 3M™ E A Rfit™ Dual Ear Enclosure Assembly Speaker is a compact size and offers easy set up