The Hanford Mailbox Post System is made from rust-free cast aluminum with a durable weather-resistant finish. This quad post no decorative base comes with support brackets, four E1 Economy Rural Mailboxes, and mounting plate on top of the E1 Economy Mailboxes are made from galvanized steel with a rust-resistant, mild steel fastener and red aluminum flag. Mail Post Support Post Bracket. Mail Plate. S As many as 50 of the parts and materials needed to build them are sourced or made to specification. Color Black. Material Aluminum. Weather-resistant paddle-coated finish. Origin: Our Hanford Mailbox Systems are assembled in the USA with some imported parts. Dimension 69 inches high x 36 inches wide x 19 inches deep. Weight: 45 lbs.