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