A valve body formed from a single piece of {TAIL ~ pliable material} is mounted in {HEAD ~ the passage} of the housing 
A valve body formed from a single piece of { TAIL ~ pliable material } is mounted in { HEAD ~ the passage } of the housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH