The core 1620 can advantageously include an opening 1630 such that the core 1620 can be mounted or other affixed to {HEAD ~ a stem} of {TAIL ~ a cartridge} or other valve housing 
of
The core 1620 can advantageously include an opening 1630 such that the core 1620 can be mounted or other affixed to { HEAD ~ a stem } of { TAIL ~ a cartridge } or other valve housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH