The Whitley is a great option for homeowners who desire a decorative mailbox post with a classic pastoral look. The smooth white post incorporates a decorative top that adds a degree of flair as well. Made from rust-proof polycarbonate plastic with an ultraviolet inhibitor to help it withstand the elements, the post utilizes a durable mounting support that can hold either one or two medium-sized or large mailboxes. The Whitley installs over a 4x4 wood post.