3M 318 1001 E A R Push Ins Disposable Corded Ear Plugs, Pod Shape, 28 dB, Blue Yellow, 100 Pairs 39UK42 Air Inlet Size 3 8 in Air Inlet Size 3 8 in ) 3 4 in Construction Steel Includes Case Application HVAC and Refrigeration Tubing Includes Storage Container Yes Material Application Soft or Annealed Copper or Similar Materials Container Type Case Package Quantity 1 Noise Reduction Rating 28 dB Item Ear Plugs Ear Plug Shape Pod Disposable Reusable Disposable Cord Options Corded Noise Reduction Rating NRR 28 dB Pairs Per Package 100 Insertion Method Push In Color Blue Yellow Metal Detectable No Cord Color Blue Series E A R Push Ins Cord Band Color Blue Corded Banded Corded Cord Material Hearing Protection Vinyl Band Color Hearing Protection Blue Cord Band Material Vinyl Ear Plug Color Yellow Standards CSA Class AL Band Material Hearing Protection Vinyl Ear Plug Material Foam Ear Plug Pair Pack Type Plastic Bag Ear Plug Packaging Bulk Box