4100 Series 11.5 in. W x 13.25 in. H x 15.75 in. D Black Locking Plain Door Cast Aluminum Column MailboxSalsbury 4100 series cast aluminum column recessed mounted column Mailboxes has a 10 in. W x 2 1 2 in. H solid brass mail flap with the word mail cast into it and is accessed from the front. It includes a 8 1 2 in. W x 6 1 2 in. H door and gold finish lock with two keys. The Mailboxes feature a durable powder coated finish and are designed to be recessed mounted in columns, masonry or walls. May be used for U. S. P. S. residential door mail delivery