The wire has {HEAD ~ a diameter} of from about 0.1 to about 0.5 millimeters and is formed from {TAIL ~ platinum}, iridium, or a platinum/iridium alloy 
The wire has { HEAD ~ a diameter } of from about 0.1 to about 0.5 millimeters and is formed from { TAIL ~ platinum } , iridium , or a platinum / iridium alloy
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH