Introducing the Penfield QUAD post , a new contemporary approach to the traditional mailbox post. This QUAD “Y” shaped post with no base, is designed to accommodate four E1 economy mailboxes, or four Lewiston mailboxes that’s mounted at the top of the post. The post is made from rust-free aluminum with a durable weather-resistant powder coated finish. We design, and build all of our QUAD post system in house. This allows us to tailor our multi-box mailbox systems to suit the needs of our customers. All of our standard mailbox systems can be made into multi-box systems. We can build double, triple, quad systems, up to eight box mailbox units using posts, base,s and finials from our Builders Series Standard and Westhaven Mailbox systems.