{TAIL ~ The shoulder region} merges into and provides a transition between {HEAD ~ the finish} and a sidewall portion 
{ TAIL ~ The shoulder region } merges into and provides a transition between { HEAD ~ the finish } and a sidewall portion
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH