{HEAD ~ Installation} of {TAIL ~ the first configuration} applies to a rearwardly flanged mailbox door 
of
{ HEAD ~ Installation } of { TAIL ~ the first configuration } applies to a rearwardly flanged mailbox door
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH