End caps are formed with tapered tangs which tightly fit into the central groove of the channel thereby securely fitting {HEAD ~ the end caps} to {TAIL ~ the opposite ends} of the channel 
to
End caps are formed with tapered tangs which tightly fit into the central groove of the channel thereby securely fitting { HEAD ~ the end caps } to { TAIL ~ the opposite ends } of the channel
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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH