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