3M 312 6001 Ear Plugs, Bullet, 31 dB NRR, Gen Purpose, Corded, Disposable, Roll Down, L Earplug Size, 200 PK 54YR10 Application Alarm Signal Lines Application Alarm Signal Lines Manufacturer Size 4 Noise Reduction Rating 31 dB Noise Reduction Rating 31 dB Earplug Color Yellow Reusability Disposable Cord Options Corded Earplug Shape Bullet Earplug Material Foam Pairs Per Package 200 Series E A Rsoft Grippers Band Material Hearing Protection Vinyl Cord Color Blue Cord Material Hearing Protection Vinyl Noise Reduction Rating NRR 31 dB Insertion Method Roll Down Metal Detectable No Band Color Hearing Protection Blue Standards 31 dB CSA Class AL Dielectric No Features Electrically Insulated Earplug Packaging Bulk Box Earplug Pair Pack Type Plastic Bag Electrically Insulated Yes Band Material Vinyl Cord Material Vinyl Refill Type Bulk Refill Country of Origin United States