Klein Tools Foam Earplugs, 50-Pair, help reduce exposure to hazardous noise and other loud environments. The soft disposable foam design conforms to the ear canal for optimal comfort and a snug fit. Tested in accordance with ANSI S3.19-1974 standards. Noise Reduction Rating (NRR) 33 decibels. Dispensing Box includes a 50-Pack of wrapped pairs of earplugs. Also available in convenient 10-Pair resealable pouch.