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Howard Leight Ear Plugs Polyurethane Foam Refill NRR 30 LPF 1 D Size:OS designed for critical environments UN448 16 2 OBK 4X designed for critical environments The seamless nylon liner enhances tactile sensitivity and comfort Howard Leight Ear Plugs Polyurethane Foam Refill NRR 30 LPF 1 D provide excellent hearing protection with a Noise Reduction Rating (NRR) of 30dB These ear plugs are crafted from low pressure polyurethane foam
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