The Salsbury Standard Cluster Mailbox and Regency® Decorative CBU Type I, Type II, Type III, Type IV, Type V, Type VI and Outdoor Parcel Lockers (OPL's) are all licensed and approved by the U. S. Postal Service. Ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other residential and commercial developments, cluster mailboxes are ultra-durable and provide a secure means of receiving mail and packages. When you install your Cluster Mailbox the local post office will install an "Arrow Lock." This lock is used for the local post master to open the unit and deliver the mail. When the U.S. Postal Service delivers a package to the parcel locker, a parcel locker key is placed in the recipient's mailbox. Once the recipient opens the parcel locker, the key is automatically retained in the lock until it is removed with the USPS control key.
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