{HEAD ~ a case} substantially equal in {TAIL ~ size} to a conventional glow starter case; and 
substantially equal in
{ HEAD ~ a case } substantially equal in { TAIL ~ size } to a conventional glow starter case ; and
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH