{HEAD ~ The base wire} is made of high temperature resistant metal, {TAIL ~ preferably an iron chromium aluminum alloy} 
is made of
{ HEAD ~ The base wire } is made of high temperature resistant metal , { TAIL ~ preferably an iron chromium aluminum alloy }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL