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3M #340-4004   Noise reduction rating (NRR): 25 dB Compatible with the 3M™ E-A-Rfit™ Validation System No need to touch the ear tips during earplug insertion, helping to keep ear tips clean longer Soft polymer is washable and reusable CSA Class AL Conforms to oval shape of ear Proprietary, premolded, triple-flange earplug design inserts easily and provides a comfortable fit for a reusable earplug 100 PR / BX   Ear Plugs, Noise Reduction Rating 25 dB, Earplug Shape Flanged, Insertion Method Push-In, Reusability Reusable, Cord Options Corded, Earplug Material Elastomeric Polymer, Earplug Packaging Bulk Bag, Unwrapped, Earplug Pair Pack Type Plastic Bag, Electrically Insulated Yes, Band Color Blue, Series E-A-R UltraFit, Cord Material Vinyl, Band Material Vinyl, Cord Color Blue, Standards ANSI/ASA S12.71-2018, Pairs per Package 100, Earplug Color Yellow, Metal Detectable No