The plunger includes a proximal end and {HEAD ~ a distal end} having {TAIL ~ a first set} of annular ridges formed thereon 
having
The plunger includes a proximal end and { HEAD ~ a distal end } having { TAIL ~ a first set } of annular ridges formed thereon
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH