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