30-Compartment Standard Rear Loading Guardian SystemThe 30 door standard rear loading Guardian system is a secure, economical alternative to standard aluminum mailboxes. Each door comes with a new bent cam for added security, preventing the doors from being pried open. The secure mailbox housing is constructed of 24 Gauge durable galvanneal steel. This high security Guardian system is designed to be stacked 2 units high, mounted side by side, or between standard wall studs. All units have identical