4C standard horizontal 3700 series mailboxes are ideal for colleges and schools, corporate mailrooms, government agencies and many other applications . A compartment equivalent to two 3.25 in. high standard doors is used for outgoing mail collection . The compartment is labeled Outgoing Mail . Includes a 10.75 in. W x 0.75 in. H mail slot and weather protection hood . The front of the outgoing mail compartment is comprised of two fixed panels and there is no U.S.P.S master lock access door . Fully integrated or stand-alone parcel lockers offer tenants a convenient way to receive packages on site . Includes factory installed 0.75 in. W x 0.25 in. D trim and one or two heavy duty rear access door(s) with latches and continuous hinges. Made of heavy gauge Aluminum and Stainless Steel hardware . 16.375 in. W x 17 in. D x 41 in. H (60 lbs.)