High NRR plugs deliver superior noise-blocking performance. Contoured bell-shaped design provides an excellent ear-canal fit with enhanced back-out resistance. Soft, expanding polyurethane foam ensures a comfortable fit. Smooth, soil-resistant closed-cell foam skin protects against dirt buildup. Leight Source 500 Refill. Corded/Cordless: Cordless; Shape: Bell; Materials: Polyurethane Foam; Noise Reduction Rate NRR: 33 dB.
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