Standard Steel Vertical Mailbox In Black. Antique Mailboxes. by House of Antique Hardware, Inc.. $65.11. Made of electro-galvanized 20 gauge steel, Salsbury 4600 series traditional mailboxes feature a durable powder coated finish available in four (4) contemporary colors and include 5 inch detachable magazine hooks. Traditional mailboxes are designed to be surface mounted may be used for USPS residential door mail delivery.