Description Elegant estate styling with industrial durability is the hallmark of the Richland Mailbox Post The Richland Post is a direct burial post and has an 18″ burial section to ensure a secure base for your mailbox The Richland 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