Details 3M E-A-R Express Pod Plugs Earplugs feature advanced "no-roll", slow-recovery foam in addition to metal detectable features to prevent earplugs from contaminating products or processes. Specially developed for food processing and other industries where it is critical to keep earplugs from contaminating products and processes. Paddle-style grips allow easy insertion and help keep earplug tips clean even when your hands are dirty. Stainless steel ball bearing in earplug stem for high detectability Noise Reduction Rating (NRR)*: 25 dB.