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