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