TRUSCO Earplugs with Metal Balls and Cord TEK31H

Provides stable, excellent sound insulation from low to high frequencies. Metal balls prevent detection by metal detectors. Made with high-density material, these earplugs fit snugly into the ear canal, providing a smooth, soft feel. Ideal for preventing foreign objects from getting inside. Cord: Yes (680mm) Size: One size fits all NRR rating: 31dB ANSI compliant Earplug body: Polyurethane (PUR) Cord: Polyvinyl chloride (PVC) Copper balls