The tubular body 122 has {HEAD ~ an open distal end} 124 and {TAIL ~ an open proximal end} 126 provided with an annular flange 128 projecting outward radially from the tubular body 122 
The tubular body 122 has { HEAD ~ an open distal end } 124 and { TAIL ~ an open proximal end } 126 provided with an annular flange 128 projecting outward radially from the tubular body 122
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH