1/4″ Cluster Box Units

C.B.U.s (Cluster Box Units)

Our CBUs (Cluster Box Units) are all custom and completely welded out of a 1/4″ steel frame with 3/16″ steel-reinforced doors. There are no rivets or spot welds, or parts that can be removed. The shell is over 3-4x thicker than the next heaviest duty CBU on the market! If you would like a quote, we need to know:

  • Number of units?
  • Number of tenants per unit?
  • Need outgoing mail?
  • Larger separate package compartments?
  • In-Ground or Surface Mount (existing sidewalk) Post/Stand?
  • Zip code for shipping?
  • Is the location a residence or commercial address?
  • If a commercial address, do you have a forklift or loading dock?

CBUs are heavy and the lightest box will be approximately 250 lbs., and go up from there. They also require front and rear door access — one side for the mail carrier and another for the tenants. You will need USPS approval for this setup.


Please call or email for details and options:

(800) 206-8067