3M 311 1251 Ear Plugs, Bullet, 33 dB NRR, Gen Purpose, Corded, Disposable, Roll Down, L Earplug Size, 200 PK MG 05 007 000 RPM Abrasive Material Carbon 000 RPM Abrasive Material Carbon Steel Compatible Tool Type CNC Machine Grit Not Applicable Color Silver Primary Material Application Carbon Steel Quick Change System Not Applicable Operating Speed Maximum 22 Working Pressure (PSI) 6000 Standards SAE JIC 37 Degrees Fitting Thread Type 1 Male NPT Hose Adapter Material Carbon Steel Fitting Thread Type 2 Male JIC Finish Trivalent Chromate Zinc Includes O Ring No Hose Fitting C Connection Type JIC For Hose Type Hydraulic Material Grade 12L14 Earplug Color Yellow Noise Reduction Rating 33 dB Earplug Color Yellow Reusability Disposable Cord Options Corded Earplug Shape Bullet Earplug Material Foam Pairs Per Package 200 Series E A Rsoft Yellow Neons Metal Detectable No Cord Material Hearing Protection Vinyl Cord Color Blue Band Material Hearing Protection Vinyl Standards 33 dB CSA Class AL Noise Reduction Rating NRR 33 dB Insertion Method Roll Down Band Color Hearing Protection Blue Earplug Pair Pack Type Plastic Bag Earplug Packaging Bulk Box Cord Material Vinyl Band Material Vinyl Electrically Insulated Yes Country of Origin United States