3M™ Combat Arms™ 393-2022L-50, 4.1 Probed Test Earplug, 50/CS
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3M™ Combat Arms™ 4.1 Probed Test Plugs, size large are a specially probed version of the standard earplug. This product works with the E-A-Rfit™ Validation Sysem and allows you to conduct an earplug fit test for the 3M™ Combat Arms™ 4.1 earplug.