1-Inch MailBoss Universal Mailbox Adapter Plate – Height Extender

Ships from USA

Make mailbox installation more flexible with the Mail Boss Universal Adapter Plate. Designed to mount a wide range of standard curbside mailboxes to Mail Boss posts, as well as many existing mailbox posts and pedestals, this low-profile adapter provides a clean, seamless appearance while offering a durable mounting solution.

At just 1 inch tall, the adapter maintains a streamlined look while allowing many popular mailbox brands to be mounted to Mail Boss posts without drilling or modifying the mailbox itself. It is compatible with Mail Boss in-ground and surface-mount posts and works with most standard curbside mailboxes, including select models from Architectural Mailboxes and Gibraltar Mailboxes.

Product Details

• Design — Low-profile universal adapter plate
• Height — 1"
• Compatibility — Works with most standard curbside mailboxes
• Mail Boss Compatibility — Designed for use with Mail Boss in-ground and surface-mount posts
• Other Posts — Can also be used with many existing mailbox posts and pedestals
• Compatible Brands — Includes select Architectural Mailboxes and Gibraltar Mailboxes
• Installation — Allows many mailboxes to be mounted without drilling or modifying the mailbox
• Spreader Bar Compatibility — Not compatible underneath a Mail Boss spreader bar
• Spreader Bar Alternative — Can be used on top of a Mail Boss spreader bar as a universal adapter

🚚 Shipping & Returns

• Ships from USA
• Typically ships in 1 day
• Verified Tracking
• Shipping rates vary

Designer’s Comments

The Mail Boss Universal Adapter Plate is a practical way to create a clean, streamlined mailbox installation while expanding your mounting options. Its low-profile design helps maintain a polished appearance around your mailbox and supports the finished look that contributes to your home's curb appeal.