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