The fixture is constructed with surfaces that allow {TAIL ~ the fixture} and water to form a seal around {HEAD ~ each device} 
The fixture is constructed with surfaces that allow { TAIL ~ the fixture } and water to form a seal around { HEAD ~ each device }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD