The Hanford Triple Post (With Support Brace), Ornate Base & Lewiston Mailbox Our Hanford mailbox post system is made from rust-free cast aluminum with a durable weather resistant powder coated finish. This TRIPLE post comes with support braces, a decorative Ornate base 7, three Lewiston mailboxes and mounting plate at top of post. The Lewiston mailboxes are made of cast aluminum and also features a tough powder coat finish. Post, support braces, mailboxes, mounting plate and base color: Black. 5.00 L. 5.00 W. 73.00 H.