The Albion, like all of our mailbox posts, is manufactured from rust-proof cast aluminum. Each piece is powder coated to give it a chip-proof, fade resistant color. Our line of direct burial posts have an 18" burial section to ensure a secure base for your mailbox. The Albion Post includes the floral mounting bracket 3" O/D x 79" Fluted Pole and Pole Topper. 18" direct burial recommended. It looks great with the floral and hummingbird curbside mailboxes.