OLD STD-4B vertical style mailboxes in existence since 1975, have now
evolved since 2003 into an improved-security design under USPS-STD-4B+;
and are approved for installation in new construction projects until early
Per the USPS guidelines in the Federal Register, from early October 2006 and forward in time,
USPS-STD-4B+ vertical style mailboxes can still be used for retro-fitting
existing installations of old STD-4B or STD-4B+ vertical mailboxes where
space and economical choices are a must. Major renovations may trigger
requirements for USPS-STD-4C wall-mounted mailbox receptacles, which is
covered in that standard.
Our “4B+” vertical mailboxes are in production and continue to provide the widest
range of quality, security and cost effective mailbox options for the
postal patrons of small communities and major metropolitan cities.
More information on this and other products can be found by selecting
the Products or Postal Specialties links on the navigation