Recognized by most metal-sensing systems, these earplugs feature an implanted stainless steel ball bearing in the plug and metal particles in the cord. Available in a vending pack (VP311-4106). These earplugs can be fit tested using the 3M™ EARfit™ Validation System. Implanted stainless steel ball bearing in the earplug and metal particles in the cord. Poly bag keeps each pair of earplugs clean before use. Regular size fits most ear canals. NRR 32 dB. CSA Class AL. Test compatible with 3M™ E-A-Rfit™ Validation System.
