{HEAD ~ The placement} of {TAIL ~ the mounting strips} and tubes in the housing can be selected as desired 
of
{ HEAD ~ The placement } of { TAIL ~ the mounting strips } and tubes in the housing can be selected as desired
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH