3M™ Tri-Flange™ Probed Test Plugs 393-2011-50, 10 Pair/Bag, 5 Bags EA/Case, 50 EA/Case

3M™ Tri-Flange™ Probed Test Plugs to be used in conjunction with the E-A-Rfit™ Validation System. Cannot be used for hearing protection.

3M™ Tri-Flange™ Probed Test Plugs are a specially probed version of the standard plug. This product works with the E-A-Rfit™ Validation System and allows you to conduct an earplug fit test for the Tri-Flange and UltraFit Plus earplugs.