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