Spira Standard Stainless MailboxMedium Post Mounted Stainless Steel Mail box. Quality Stainless Steel survives the harshest seasons and environments. Its unique shape and precision crafted door with elastomeric gasket helps protect mailbox contents. Contemporary yet traditionally appealing, Mailbox can be mounted to any number of post types including Wood, Fiberglass or our Spira designed EZ mount post (when used with the Spira bracket). Uses standard mail post arm mount plates