CS35`N / CS361N / CS510 / CS520. Plantronics CS510 / CS520/ W710 / W720 Wireless. You are buying (4) pieces Foam Ear Cushion 71781-02 for Plantronics CS510 / CS520 / W710 / W720 wireless headsets. This item is unused and compatible with Plantronics CS510 / CS520 / W710 / W720 Headsets.
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