Product Description Salisbury Industries recessed mounted 4C horizontal mailboxes for private access are ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications . Available as front loading unit or rear loading unit. The 4C horizontal mailboxes feature a durable powder coated finish available in aluminum, bronze, gold and sandstone. From the Manufacturer Salsbury 3700 Series 4C Horizontal Mailboxes - Rear Loading - Private Access are 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. Feature a durable powder coated finish available in aluminum, bronze, gold and sandstone. 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, MB2 doors are 13-1/4" W x 6-3/4" H, MB3 doors are 13-1/4" W x 10-1/4" H and MB4 doors are 13-1/4" W x 13-3/4"H. Available in three (3) MB1 equivalent door high units to fifteen (15) MB1 door high units. The popular maximum high (56-3/4"H) units are also available. ADA compliance guidelines. Available in configurations that are 1 door wide (single column) and 2 doors wide (double column). Fully integrated and stand-alone parcel lockers are available in 5 MB1 door heights (PL5 - 17-1/4" high) and 6 MB1 door heights (PL6 - 20-3/4" high). 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" W x 3/4" H mail slot and weather protection hood. Salsbury Industries is an ISO 9001: 2008 certified company and has excelled in the field of manufacturing since 1936