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