{TAIL ~ Another advantage} of the invention is that the glass core can be substantially centered with {HEAD ~ respect} to the larger diameter exterior surface of the second sleeve 
{ TAIL ~ Another advantage } of the invention is that the glass core can be substantially centered with { HEAD ~ respect } to the larger diameter exterior surface of the second sleeve
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH