The upper end 42 is optionally secured to the open lower end 24 of {HEAD ~ the T} shaped {TAIL ~ two piece housing} 12 
The upper end 42 is optionally secured to the open lower end 24 of { HEAD ~ the T } shaped { TAIL ~ two piece housing } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH