The Carlisle body is durably made from galvanized steel for longevity then fully powder coated in a black finish with contrasting nickel flag. The textured molded resin frame has an integral handle etched with US MAIL in a modernistic font. The floor is predrilled with mounting holes in a pattern of 10 in. x 4 in. and also 5 in. x 5 in. giving you options if you are replacing an existing mailbox. If you prefer to mount using the body of the mailbox there are 4 embossed holes on both sides that are 3.8 in. apart. Installation hardware is not included with mailbox. Mounting bracket may be required to mount to post (not included). The Carlisle Post Mount Mailbox is USPS Approved by the Postmaster General.