 Purchasing quantities of 3+ ? For bulk pricing call us at 1-866-748-3526 or send an email to sales@telecomsuperstore.com.Replacement purple voice tube for Plantronics H81, H91, H101, H171, H251, H261, H351, and H361 model headsets. This microphone tube extension is required for crisp, clear communication when using a headset. It is recommended by the Plantronics, the manufacturer, to be replaced every 6-month.
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