{TAIL ~ Conductor} 50 can be composed of copper, {HEAD ~ silver}, or silver plated copper 
{ TAIL ~ Conductor } 50 can be composed of copper , { HEAD ~ silver } , or silver plated copper
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH