Check the listing for details. Architectural Mailboxes 7540B-10 Mailbox Adapter Plate 4" x 4" Black. Color: Black, Condition: Open box, Made in China. Listed at 19.99 USD. “Open Box Item” but are New in packaging Upgrade your mailbox with the Architectural Mailboxes 7540B-10 Mailbox Adapter Plate, designed to enhance both the function and appearance of your traditional mailbox. Crafted from durable steel and finished in a classic black, this adapter plate measures 4" x 4" and is perfect for a seamless integration with your existing mailbox setup. The item's model number 7540B-10 and MPN 7540B10 ensure you're getting a genuine product from Architectural Mailboxes, known for their quality and resilience. This adapter plate is fade resistant, ensuring long-lasting performance and a consistent look, and it comes as a single unit with all necessary fixings supplied, simplifying the installation process.