{TAIL ~ Intermediate tube} 216 is essentially a larger version of inner tube 214 and includes {HEAD ~ rigid proximal and distal regions} 262, 264 that are integrally connected by flexible region 228 
{ TAIL ~ Intermediate tube } 216 is essentially a larger version of inner tube 214 and includes { HEAD ~ rigid proximal and distal regions } 262 , 264 that are integrally connected by flexible region 228
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH