The flow barrier additionally includes {HEAD ~ a handle section} in {TAIL ~ the form} of a fluted flange 
The flow barrier additionally includes { HEAD ~ a handle section } in { TAIL ~ the form } of a fluted flange
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH