3M™ E-A-R™ Push-Ins™ Metal Detectable corded earplugs were specially developed for food processing and other industries where it is critical to keep earplugs from contaminating products and processes. Recognized by most metal-sensing systems, these earplugs feature an implanted stainless steel ball bearing in the plug and metal particles in the cord. Benefits •Surgical grade stainless steel ball bearing is encased in each earplug stem. Cord is also metal detectable. •Poly bag keeps each pair of earplugs available or accesible for re-use. •Soft polyurethane foam tips •Blue stem makes fitting and removal easy and helps keep the tips clean when the wearer's hands are dirty. •Noise Reduction Rating (NRR)* 30 dB. CSA Class AL.