The standard rear-loading Guardian system is a secure and economical alternative to standard aluminum mailboxes. Each of the 18 doors is designed with a new bent cam for added security, preventing the doors from being pried open. The mailbox housing of this lockable unit is made of 24-gauge durable galvanneal steel.

These high-security Guardian system is designed to be stacked two units high, mounted side by side, or between standard wall studs. All units have identical outside dimensions, allowing you to mix & match different door sizes. Guardian mailbox units are ideal for universities, military installations, and anyplace needing a private mail system.