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