3M™ Skull Screws™ Probed Test Plugs 393-2012-50, 50 pair/case, 10 pair/bag, 5 bags/case

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

3M™ Skull Screws™ 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 P1300 and P1301 earplugs.