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