{HEAD ~ Each base member} is {TAIL ~ a one piece molded plastic structure} having sidewalls, endwalls, a central portion forming a recessed area and four leg receiving sockets 
is
{ HEAD ~ Each base member } is { TAIL ~ a one piece molded plastic structure } having sidewalls , endwalls , a central portion forming a recessed area and four leg receiving sockets
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH