Rust-Free Mailbox Mounting Bracket, Aluminum, Large (fits 21” L x 8” W mailboxes) : Amazon.ca: Tools & Home Improvement
Beautiful Steel Beam... - Beautiful and Unique Mailboxes | Facebook
Can you make a mailbox post out of cement as a deterrent for cars hitting it? - Quora
Burgett metal works - Custom mailbox these are made out of 1/8 inch steel with a 4x4 beam welded on super heavy for all you people that keep getting you mailbox hit