The striking hummingbird details on both sides and the front of this mailbox make it more than your average mailbox. The deeply embossed designs show your love of nature and will last through a lifetime of weathering.The Springfield Series Mailbox Post features a 4" x 4" x 78" smooth square post. Made entirely of aluminum with stainless steel components to eliminate rusting. Direct burial installation is required.This mailbox combination also includes an easy to install locking insert, to help protect from identity theft. Manufactured from rust free powder coated aluminum, the Lock Box firmly attaches to the bottom of the mailbox and cannot be removed without the key. The Lock Box insert is easly installed with four screws (included). Consult your local postmaster regarding regulations governing the installation of locking inserts.