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DescriptionUltraFit ™ Uncorded Earplugs in Polybag, 340-4003 100PR/BX Patented curved flange design gently hugs the ear canal to provide an effective seal protecting against noise. • Patented, premolded, triple-flange design inserts easily. • No rolling or sizing needed to get a comfortable, protective fit. • Hypoallergenic polymer is washable and reusable. • NRR 25dB. • ANSI S3.19-1974; CSA Z94.2; CSA Class AL.