Both the tubular body and {HEAD ~ the flange} consist of {TAIL ~ flexible, resilient material}, e.g., elastomeric material 
consist of
Both the tubular body and { HEAD ~ the flange } consist of { TAIL ~ flexible , resilient material } , e.g. , elastomeric material
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH