Plantronics 29960-40

Green Voice Tube - Microphone Tube
H81, H91, H101, H141, H171, H251, H261, H351, H361
$9.95 from an Authorized Plantronics Distributor
 

Replacement green 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.