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Mail Boss Triple Mount Locking Mailboxes with Post

  • Triple Threat! The MailboxWorks’ solution to high security multi-unit mailboxes.
  • The Mail Boss mailbox triple post mount system is designed for residential curbside mail delivery and to accommodate three separate mailboxes mounted on a shared mailbox post.
  • Each Triple Mailbox Post package includes 3 of Mail Boss’ popular high security locking mailboxes, featuring commercial grade security features including a y-pin brass core tube lock, patented anti-pry latch locking system and 12 and 14 gauge steel with powder-coat finish.
  • This triple Mailbox Post Design uses the Mail Boss 3 Box Spreader Bar, constructed from 12-gauge galvanized steel. When mounted to the Mail Boss post, three mailboxes can be securely mounted.
  • Select an In-Ground Post if you plan to dig a hole or install over an existing 4x4 post, or a Surface Mount Post option for fastening the post to the sidewalk or curb.
  • Mail Boss’ popular Fast-Trak Mounting system and hardware makes it easy to install these multi unit mailboxes in just a few minutes.
  • The Mail Boss tri mount mailbox and post system comes in 4 powder coat color options: Black, White, Bronze or Granite.
  • The MailboxWorks also provides the Three Mailbox Post system with 3 sets of 3 keys, reflective address numbers, drill bit and post mount mailbox installation hardware.
  • Not what you had in mind? View more Multi-Unit mailboxes at MailboxWorks.
Available Finishes
Mail Boss Post Mount Mailbox Black
Mail Boss Post Mount Mailbox Bronze
Mail Boss Post Mount Mailbox Granite
Mail Boss Post Mount Mailbox White
Self Applied Front and Side Lettering
Mail Boss Post Mount Mailbox Lettering
Mailbox Posts
Mail Boss Mailbox In-Ground Post
In-Ground Post
Mail Boss Mailbox Surface Mount Post
Surface Mount Post
Mail Boss Post Mount Mailbox Specs
Order Your Mailbox
Our Low Price: $715.00FREE SHIPPING
Availability: In Stock Ships In 24-48 Hours
Mail Boss Mailbox Finish More Info
Mail Boss Mailbox Post More Info
Front Lettering - Self Applied
Self Applied Front Lettering More Info
Mailbox Details
Item Number:
  • Mailbox
  • In-Ground Post
  • Surface Mount Post
  • Tri Spreader Bar
  • Mailboxes
  • In-Ground Post
  • Tri Spreader Bar
  • Lock with 3 Keys
  • Reflective House Numbers
  • Installation Hardware
  • Mailbox
  • 13.5"H x 11.25"W x 21"D
  • In-Ground Post
  • 43"H x 4"W x 4"D
  • Surface Mount Post
  • 27"H x 4"W x 4"D
  • Tri Spreader Bar
  • 2"H x 33.75"L x 5"D
  • Mailbox
  • 37 lbs
  • In-Ground Post
  • 14 lbs
  • Surface Mount Post
  • 16 lbs
  • Spreader Bar
  • 9 lbs
  • Mail Boss Mailboxes
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