The Gentry all-in-one mailbox & post combo features a virtually indestructible double-wall plastic construction. The mailbox has a rear door for safe mail retrieval, keeping children and adults away from traffic. It is large enough to allow magazines to lay flat. The post features a built-in compartment for newspapers or small parcels. Installation is quick and easy. The unit slides over a new or existing 4 x 4 post (not included).