Add appeal to new developments and provide a stylish alternative to the standard USPS Cluster Box Units with these decorative high-security CBUs. These horizontal CBUs are available in black, bronze, green, grey and white. Purchase new CBUs or update existing ones by purchasing these new bases and tops separately. Each secure CBU includes 6 tenant doors and 2 parcel lockers for larger package delivery. These powder-coated aluminum units are not Postal approved. Ask your Carrier if he or she will deliver.