We manufacturer custom mailboxes and street signs from our Terre Haute, IN location. As a subsidiary of Modern Aluminum Castings, Alumina Products Inc. has built off of Modern’s custom cast aluminum casting capabilities to specialize in custom mailboxes and street signs for both residential and commercial applications. For over 20 years, Alumina Products Inc. has been combining modern technology with traditional casting methods to provide quality aluminum and metal mailboxes, street signs, frames and more to Southwest Florida and across the United States.