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