Onyx Duo

Premium aluminum. Dual mailbox system. Clean modern design.

Onyx Duo is a complete double-mailbox system built with two regular-size Onyx aluminum mailboxes mounted on one shared post configuration. It gives two addresses their own separate mailbox while maintaining the same clean architectural look, premium materials, and customization options as the single Onyx.

Features:

• Two regular-size Onyx aluminum mailboxes
• 14-gauge powder-coated aluminum construction
• USPS Size C2 compliant mailboxes
• Weather-resistant finish for year-round outdoor use
• Black or white mailbox finish options
• Matching black or stainless-steel door configurations
• Optional locking system
• Optional laser-engraved house numbers on compatible stainless-steel doors
• Separate mailbox bodies for easier service and replacement
• Shared aluminum post included in the configured system price

Mailbox Dimensions: 8.5" W × 8.25" H × 20.5" D each
Material: 14-gauge powder-coated aluminum

Post Options:
Choose a 2×2 or 4×4 in-ground aluminum post configuration directly on this page. The displayed system price includes the standard 2×2 post configuration, with the 4×4 option shown as an upgrade.

House Numbers:
Each mailbox can be personalized separately with side numbers or compatible stainless-door engraving, making it easy to identify both addresses.

Lead Time:
Please allow approximately 7–14 business days for production before shipping or installation.

Shipping & Installation:
Nationwide shipping is available. Professional installation is offered separately throughout Palm Beach, Broward, and Miami-Dade counties.