Extra-Large Locking Mailboxes for 4 Units — Built Tough, Looks SharpThe Mail Boss Mail Manager Locking Metal Extra Large Mailbox system from Mailboxes Are Us is a 4-unit, heavy-duty locking mailbox solution designed for properties that need serious mail security and serious capacity. Available in Black and Brown or Granite, this metal mailbox system combines an extra-large compartment size with a secure locking mechanism — keeping mail and small packages safe from theft while handling the volume modern residents receive.Why the Mail Boss Extra Large Is the Smart Upgrade Extra-large compartments — oversized mailbox slots accommodate larger envelopes, magazines, and small packages that standard mailboxes can't handle Secure locking mechanism — each compartment locks independently, protecting every resident's mail from theft and unauthorized access Heavy-duty metal construction — durable steel build resists tampering, prying, and forced entry Weather-resistant finish — built to hold up outdoors through rain, sun, and temperature extremes without rusting or fading Multiple color options — choose Black and Brown for a classic look or Granite for a modern, neutral finish that suits any exterior 4-unit configuration — ideal for duplexes, fourplexes, small apartment buildings, and HOA communities Whether mail theft is a concern or your residents simply need more mailbox space, the Mail Boss Extra Large 4-unit system delivers the capacity, security, and style to handle it all.Select your color above and contact us with any installation questions.