Ambrose, Black, Deluxe Curbside Mailbox, Made Of High Density Polypropylene, Mounts To Any Standard Mailbox Post, Not Included, In Minutes With A Screwdriver, Knob Installs In Seconds With No Tools Required, 35% Larger Capacity Than Standard Mailboxes, Won't Rust Or Dent, Approved By U.S. Postmaster General, 19.75"L x 11.25"H x 8.5"W Assembled Size, 5 Year Warranty.