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DescriptionE•A•R Classic™ Corded Earplugs - Polybag 200PR/BX The world's first foam earplugs and still the most widely used cylindrical earplug today. • Slow-recovery foam helps ensure comfort and minimize pressure. • Bright yellow color provides a quick visual compliance check. • Dermatologically safe foam is non-irritating, nonflammable, and moisture-resistant. • Standard size fits most people. • NRR 29dB. • ANSI S3.19-1974; CSA Class AL.