These test earplugs are modified with a probe tube for use during earplug fit testing with the 3Mâ„¢E-A-Rfitâ„¢Validation System
Y-Harness for mounting a boom microphone to the left earcup and enabling connection to a PTT adapter for two-way radio communication These test earplugs are modified with a probe tube for use during earplug fit testing with the 3Mâ„¢E-A-Rfitâ„¢Validation System 3M is Leading the Advancement of Hearing Conservationâ„¢.