THESE LOW-PRESSURE EAR PLUGS ARE TAPERED FOR EASY FITTING AND REMOVAL. THE NON-IRRITATING SMOOTH SURFACE PRODUCES ADDED COMFORT. METAL DETECTABLE SPARK PLUGS ARE FOR FOOD PROCESSING APPLICATIONS. THE CORD IS ALSO METAL DETECTABLE. NOISE REDUCTION RATING (NRR) 33. SOLD BY THE BOX. 100 CT. BOX.