Find mailboxes at Target.com! The step2 mailbox is large enough for your mail, magazines and more. This roadside mailbox also has a separate newspaper holder and outgoing mail flag. Able to withstand the elements, this mailbox is made of wrought iron with a double-wall resin construction. It can be mounted on a standard 4" x 4" post (sold separately). Includes address numbers, post cover and mounting hardware. Usps certified.? assembly required.