Howard Leight Laser Trak Detectable earplugs made from self adjusting polyurethane foam in a contoured T-shape. Non-ferrous metal grommet and bright colors allow for easy detection during visual and automated insepctions. Noise Reduction Rate (NRR) = 32dB and Maxiumum Attenuation @ Frequency = 52.000dB @ 8000.000Hz. 100 pair/box
*Tested and approved for ANSI S.3.19-1974
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