3M™ Skull Screws™ Probed Test Plugs are a specially probed version of the standard plug.
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.