{HEAD ~ The sleeve extension} 151 has an external diameter D3 as measured to exterior surface 153 which is different from the external diameter D1 of primary inner shell 30′ and different from the internal diameter {TAIL ~ D2} of the secondary inner shell 40 
{ HEAD ~ The sleeve extension } 151 has an external diameter D3 as measured to exterior surface 153 which is different from the external diameter D1 of primary inner shell 30′ and different from the internal diameter { TAIL ~ D2 } of the secondary inner shell 40
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH