The outer surface is secured to the inner cavity of {TAIL ~ the T} shaped {HEAD ~ two piece housing} 
The outer surface is secured to the inner cavity of { TAIL ~ the T } shaped { HEAD ~ two piece housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD