At the office, you want to make sure that your mail is protected, so a security locking Mail Boss mailbox might be an ideal solution if you need plenty of space for potential mail. Mail Boss mailboxes are quite large and durable and would be perfect for the office as well as residential environment. What's so great about these units is their size; you can fit a lot of mail in one of these, then you lock is a good one so they offer plenty of security for your mail. Mailboss makes a range of different large mailboxes in different colors such as black, grey and white. You can also find mailbox posts that fit great on these units. 
Mail Boss Locking Security Mailbox
"U.S. Postmaster Approved. Made of 12-gauge and 14-gauge electro galvanized welded steel. Innovative patented anti-pry latch locking mechanism. Exclusive Fast-TrakTM Mounting Plate for quick installation. Full service, large capacity curbside locking security mailbox. Stainless steel hinges for ease of use. Includes vandal resistant flag, 3 keys & reflective house numbers. Locking access door w/ commercial grade brass core tube lock" Price: $190 This particular mailbox can be found at lowes.com where it costs just under $200. That's a pretty good price for such as large unit. These models are made in galvanized welded steel and feature stainless steel hinges and reflective house numbers which you can set yourself in order to get the right number. The lock is made in commercial grade brass core tube, so it should be fine for an office or other business environment. So if you're looking for an appropriate mailbox that has a solid lock and good security, then Mail Boss might be a good match for you.
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