Check the listing for details. Gibraltar Hamilton Premium Large Locking Aluminum Post Mount Mailbox White Displ. Color: Black, Condition: Open box. Listed at 79.00 USD. Display box has some scuffs. See pictures. This premium mailbox from Gibraltar is perfect for those who value security and style. Made of durable aluminum and featuring a locking mechanism, this mailbox will keep your mail safe and secure. The large size provides ample space for all of your mail and packages, while the sleek black color and post mount design make it a stylish addition to your home. Assembly is required for this mailbox, but it is easy to put together and comes with all the necessary hardware. Measuring 12.65 inches deep, 17.7 inches high, and 18 inches wide, this mailbox is perfect for those who receive a lot of mail. The Gibraltar Hamilton Premium mailbox is made in Gibraltar and is sure to impress.