The base member, post, and closure member may be composed of {TAIL ~ a wide variety} of {HEAD ~ materials} 
The base member , post , and closure member may be composed of { TAIL ~ a wide variety } of { HEAD ~ materials }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD