In embodiments of the present invention including a pressure activation assembly, the outer housing is formed by {HEAD ~ a pair} of {TAIL ~ covers} having a degree of flexibility and elasticity 
of
In embodiments of the present invention including a pressure activation assembly , the outer housing is formed by { HEAD ~ a pair } of { TAIL ~ covers } having a degree of flexibility and elasticity
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 OTH OTH OTH OTH OTH OTH OTH