A portion 46 of sleeve 41 has a length L substantially equal to the distance between shoulder 33 and {HEAD ~ the nearest edge} of {TAIL ~ plastic bead} 38 
of
A portion 46 of sleeve 41 has a length L substantially equal to the distance between shoulder 33 and { HEAD ~ the nearest edge } of { TAIL ~ plastic bead } 38
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH