Foam missing inside left ear, could be used for parts HD-3A Dual-Sided Headset with 21dB NRR, Flexible Dynamic Boom Mic, & A4F Connector The HD-3A is a dual-sided monaural hearing protector type headset with noise-canceling dynamic micro- phone. EPA rated NRR of 21 dB. The polyurethane earcups house 150Ω dynamic elements and feature an easily adjustable headband. The 6’ cord is coiled for tangle-free use.
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