Made of heavy duty aluminum, Salsbury cluster box unit are accessed from the front through two easy opening master door panels and feature a durable powder coated finish. Each CBU includes four fully integrated parcel locker and a matching pedestal. Each aluminum CBU door includes a heavy duty five pin cylinder cam lock with a dust/rain shield and three keys. One additional compartment in each unit is labeled outgoing mail and includes a weather protection flap. Minor assembly is required.