The Hampton Black Mailbox and Post Kit are constructed of high density plastic for lasting durability. The kit includes an attractive mailbox with highlighted U.S. Mail lettering on the door a newspaper port and a post sleeve that slides over a new or existing 4 in. x 4 in. x 48 in. treated pine post (not included). The mailbox also has 30% more capacity than standard mailboxes making it both roomy and stylish. Instant curb appeal will be achieved when you install the Hampton Black Mailbox and Post Kit.