The particular material used, 7075 aluminum, is {TAIL ~ a readily available alloy} of {HEAD ~ aluminum}, zinc, magnesium, copper and chromium 
The particular material used , 7075 aluminum , is { TAIL ~ a readily available alloy } of { HEAD ~ aluminum } , zinc , magnesium , copper and chromium
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH