{HEAD ~ The inner sealing member} is received within {TAIL ~ a space} between the webs of the grommet 
is received within
{ HEAD ~ The inner sealing member } is received within { TAIL ~ a space } between the webs of the grommet
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH