CBU Cluster Box Units provide a flexible USPS-compliant solution for mail and parcel delivery in a centralized location. Rugged weather- resistent powder coat finish resists scratching and vandalism. Standard stock units include heavy duty tenant cam lock with three keys, parcel lockers with key trapping locks and outgoing mail slot with weather protection hood. Standard silver identification decals with black numbers. They can be used individually or in clusters. All units include a pedestal for USPS installation regulations and are available in six architectural colors. All units are made to order and non-returnable.