The space provided between brush members 4 a and {HEAD ~ 4 b} allows a mounting strip to be included in {TAIL ~ the housing} 
The space provided between brush members 4 a and { HEAD ~ 4 b } allows a mounting strip to be included in { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL