{TAIL ~ first and second end caps} formed with tangs providing an interference fit with the walls of said central groove of said channel to secure said first and second end caps to said first and said second ends of {HEAD ~ said channel}, respectively 
{ TAIL ~ first and second end caps } formed with tangs providing an interference fit with the walls of said central groove of said channel to secure said first and second end caps to said first and said second ends of { HEAD ~ said channel } , respectively
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH