Ease your mind about the security of your mail and small parcels by investing in the large capacity USPS approved high security Curbside Lockable Mailbox. Postal carriers simply open the top door and place your mail and parcels inside. Once the door is closed, these items slide down to the locked retrieval compartment with access doors, either in the front or rear. This compartment requires a key to access the front access door or the back access door for mail retrieval. Two keys are included with the unit. The rear door retrieval door allows you to collect mail on the safe side of the street and eliminates standing in the busy roadway. This unit includes a plastic post wrap that fits around a standard 4” X 4” wooden post (post sold separately). This mailbox is ideal for business, homes, colleges, schools, military bases, and much more. Black Color.