As of October 6, 2006, USPS STD-4C compliant mailbox systems are mandatory on all NEW CONSTRUCTION and MAJOR RENOVATIONS. Mailboxes that are 4B+ compliant will only be considered USPS Approved if they are replacing existing mailboxes in an existing rough wall opening that is not being disturbed or changed during the renovation. If you have USPS compliance questions related to your specific project, please contact your local Postmaster.

It is strongly recommended that you acquire local Post Master approval BEFORE ORDERING any 4B+ product. Orders can not be canceled or returned.

The premium heavy duty American Device line of the Centurian 2600 Series Horizontal Mailboxes are constructed of heavy gauge anodized aluminum and designed for use in apartments, condominiums, mobile home parks, commercial buildings and similar settings serviced by the Postal Service.