This durable, 12 door mailbox is long-lasting and made from high quality materials. It is USPS approved and meets all STD-4C requirements for new construction and renovations. This corrosion resistant unit is perfect for both indoor and outdoor use (with kiosk or other application, pending local USPS approval). You can rely on this mailbox to last you years, as it is made from heavy gauge aluminum with stainless steel hardware. Each door is outfitted with a heavy duty lock (three keys included) so you can rest assured all mail will remain safe until it is picked up. The outgoing mail compartment features anti-fish comb for additional security. Such a quality unit is perfect for your apartment, school, residential development, and more. Please contact us for specific unit measurements.