In the embodiment of the present invention illustrated in FIGS 1 and 2, the reinforcing agent 16 is {HEAD ~ an O ring} placed between {TAIL ~ the barbs} 12 of the connector 10 
In the embodiment of the present invention illustrated in FIGS 1 and 2 , the reinforcing agent 16 is { HEAD ~ an O ring } placed between { TAIL ~ the barbs } 12 of the connector 10
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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH