4C horizontal mailboxes for Private Access, Ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications, For indoor or outdoor use, Constructed of heavy duty aluminum and stainless steel hardware, Doors include a heavy duty cam lock with a dust/rain shield and 3 keys, MB1 doors are 13-1/4"" W x 3-1/4"" H, A compartment equivalent to two 3-1/4"" high standard doors is used for outgoing mail collection and is labeled ""Outgoing Mail"", The front of the outgoing mail compartment is comprised of 2 fixed panels and there is no master commercial lock access door, Outgoing mail compartment includes a 10-3/4"" H x 3/4"" H mail slot and weather protection hood, Include factory installed 3/4"" W x 1/4"" D trim and 1 or 2 heavy duty rear access door(s) with latches and continuous hinges, Parcel locker doors include master commercial lock(s), Double column, Color: Gold, SKU: SBRI1811