{HEAD ~ The valve body} is made of {TAIL ~ a resilient material} which will conform to the shape of the outer wall of a catheter when the catheter penetrates through the slits and opening in the valve body thereby maintaining a fluid tight seal between the outer wall of the catheter and the valve body 
is made of
{ HEAD ~ The valve body } is made of { TAIL ~ a resilient material } which will conform to the shape of the outer wall of a catheter when the catheter penetrates through the slits and opening in the valve body thereby maintaining a fluid tight seal between the outer wall of the catheter and the valve body
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH