A mouthpiece is attached by a reduced diameter neck to {HEAD ~ the first end} of {TAIL ~ the cup portion} 
of
A mouthpiece is attached by a reduced diameter neck to { HEAD ~ the first end } of { TAIL ~ the cup portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL