137-0042, 3M E.A.R, 3M E.A.R Classic Series Yellow Disposable Uncorded Ear Plugs, 31dB Rated, 500 Pairs, Brand 3M E.A.R, Reusable/Disposable Disposable, Attachment Style Uncorded 3M E.A.R Classic Series Yellow Disposable Uncorded Ear Plugs, 31dB Rated, 500 Pairs