{TAIL ~ A transition portion} between the elongate portion and {HEAD ~ the spherical portion} is preferably generally tapered, or frustro conical 
{ TAIL ~ A transition portion } between the elongate portion and { HEAD ~ the spherical portion } is preferably generally tapered , or frustro conical
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH