Weather Tough, Year-Round: Rain, snow, or sun galvanized steel construction makes this mail box one of the most reliable metal mailboxes for outside use. Rust-Resistant Finish: The powder-coated surface adds an extra layer of protection to this curbside mailbox, helping prevent corrosion in all climates. Spacious, Not Oversized: Large mailboxes for outside offer plenty of room for mail, plus multiple packages without looking bulky at your curbside. USPS Post Master General Approved: Mailbox is USPS approved, as required for all curbside delivery by U.S. Mail carriers - for smooth, uninterrupted service. Install in Minutes: Fully assembled & ready to mount.