FOR SALE IS ONE (1) NEW PLANTRONICS BRAND CLEAR REPLACEMENT VOICE TUBE MPN 29960-01 or 44143-02 (exact same item) UPC# 017229003712. THIS ITEM IS SOLD WITHOUT RETAIL PACKAGING. YOU WILL RECEIVE ONE (1) VIRGIN NEW PLANTRONICS VOICE TUBE FOR USE ON THE FOLLOWING PLANTRONICS HEADSET MODELS ENCORE H91, H101, TRISTAR H81, DUOSET H141, DUOPRO H151, H161, H171, H181 SUPRAPLUS H251, H261, H351, H361, CS351, CS361. PLANTRONICS RECOMMENDS YOU CHANGE THIS PART ABOUT EVERY 6 MONTHS OR WHEN DAMAGED FOR CRISP CLEAR COMMUNICATION. BRAND NEW ITEM GUARANTEED PLANTRONICS AUTHENTIC, NOT IN RETAIL PACKAGING, SINCE I PURCHASE THESE IN BULK. YOU WILL RECEIVE ONE (1) GENUINE PLANTRONICS VOICE TUBE voicetube SHIPPED BY USPS FIRST CLASS MAIL....

note... the end of your voice tube will become gunked up from time to time. if you cannot blow (or suck) air through the voice tube, it is gunked up. carefully soak it in warm soapy water, then flush and flush again, using warm water. you will need to "suck" a bit of warm water FROM a cup, using the voice tube as a straw to get the last of the gunk and soap residue flushed from the end mesh filter. failure to do so will result in failure. finally, you must dry thoroughly, blowing (and sucking) through your voice tube. failure to do so will result in microscopic rust particlate in the end mesh filter. it is a big job for such a small piece. do it right to extend the life of your voice tube.