Salsbury Industries 3316SAN-U 16 A Size Doors, Sandstone Type III Cluster Box Mailbox Unit One compartment is labeled "Outgoing Mail" and includes a weather protection flap and an 11-3/4" W x 3/4" H mail slot Include a carrier access door for U.S.P.S. installed master lock Include 1 or 2 fully integrated parcel locker(s)