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PROFESSIONAL GRADE - OEM.
High-Density Foam Tip for Director™, Patriot™, Stealth™, Star™, Signal™, Shadow™ earpieces and Commander™ headset.
Genuine attenuation per ANSI S3.19-1974. Test conducted by E-A-RCALSM laboratory.
Noise Reduction Rating (NRR) per EPA-1979 = 29.5.
Depending upon the frequency (Hz) the noise reduction amount varies in decibles.