Description The Main Street Series of Mailbox Posts feature a 4″ square post with sculpted corners and accent flutes for a unique look The mailbox post is a direct burial post and has an 18″ burial section to ensure a secure base for your mailbox The Main Street Mailbox Post is made to fit almost any mailbox A customer provided 1″ thick board can be used under the base of most any mailbox for easy installation using existing holes in the mailbox Made from solid Cast Aluminum and Powder Coated for rust proof, maintenance-free use and enjoyment Available in 14 exciting colors and finishes