3M Earplug Ultrafit Metal 100BX Box. 3M E-A-R UltraFit Metal Detectable Corded Earplugs is part of a wide selection of 3M Ear plug gages or accessories. Combining excellent quality with an affordable price the 3M E-A-R UltraFit Metal Detectable Corded Earplugs can meet your scientific research needs while still offering a good value for a budget conscious end user. If you have any questions about any of our Ear plug gages or accessories please do not hesitate to contact our customer service for further guidance. Specifications for 3M E-A-R UltraFit Metal Detectable Corded Earplugs: Manufacturer: 3M Quantity: 100 Available quantity options: Box 3M Earplug Ultrafit Metal 100BX 340-4007 Box