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Our accessories include mailbox brackets, mounting plates, address plaques, and replacement flag kits.

The 4 x 4 Anchor Post Kit is great for simplifying installation of popular plastic mailbox and post combos that require a 4 x 4 post for installation. Kit includes wooden post and steel drive-in anchor. Made in the USA.
This address number plaque will mount to most mailboxes or posts in a variety of positions either horizontally or vertically. It's highly visible reflective material makes it ideal for quick identification of your address at night. The plaque will accommodate five numbers when mounted horizontally and four numbers when mounted vertically. Self adhesive numbers and mounting hardware is included. The package also includes an easy-to-use guide for aligning the numbers on the plaque.
Replacement Flag Kit
These heavy-duty mailbox mounting brackets are constructed from galvanized steel. They adjust to fit any size Postmaster approved rural mailbox. Includes mailbox mounting hardware and instructions.
The Universal Mailbox Mounting Board is made of a durable molded plastic construction. It mounts to 4 x 4 wood or plastic posts. It will adapt to fit any size post mount mailbox. The mounting board includes mailbox mounting hardware and instructions.

Mounting brackets for round steel mailbox posts. Fits standard size mailboxes. These heavy-duty mailbox mounting brackets are constructed from galvanized steel. Includes mailbox mounting hardware and instructions.
This waterproof address number plaque will mount to most mailboxes. Includes 312 self adhesive numbers and letters and mounting hardware. The package also includes an easy-to-use guide for aligning the numbers on the plaque.
Is your mailbox flag in need of replacement? If so, a replacement flag kit may be your answer. The flag kit is a durable three piece kit with an aluminum red flag and plastic hub and washer for easy installation and will not rust or deteriorate.
Lost your mailbox keys! The lock replacment kit is complete with various steel throw latches, lock cam and two keys. The installation is easy and can be used on all Gibraltar mailbox products.
The unique black heavy duty steel mounting bracket has been designed to fit all mailboxes with mounting holes either on the side or underneath the mailbox. The mounting bracket can support light, medium and heavy weight mailboxes. Mounting hardware included.