Ideal for apartments, industrial structures and non commercial developments. Required for new construction as well as key remodels. U.S.P.S. standard 4C requires at the least one parcel locker for every ten tenant compartments. For outdoor or indoor use. Constructed of heavy duty aluminum and stainless steel hardware. Doors include a heavy duty cam lock with a dust/rain shield and three keys. MB1 doors are 13 1/4 apos apos W x 3 1/4 apos apos H. A compartment equivalent to 2 3 1/4 apos apos high basic doors is used for outgoing mail collection and is labeled Outgoing Mail . The front of the outgoing mail compartment is comprised of two fixed panels and there's zero U.S.P.S. master lock access door. Outgoing mail compartment includes a 10 3/4 H x 3/4 H mail slot and weather protection hood. Single column. Color Bronze. Include factory installed 3/4 W x 1/4 D trim plus one or two heavy duty back access door s with latches and continuous hinges....