AGE OLD PROBLEM, IF YOU WANT TO DOUBLE STACK OVER SIZED CABIN ON TOP OF A STANDARD CONTAINER. THESE STACKING BARS LOCK SECURELY INTO THE TOP OF LOWER CONTAIANER AND ALLOW YOU TO PLACE AN OVER SIZED OFFICE CABIN ON TOP. SIMPLE SOLOUTION TO OVER COME A PROBLEM. The item "SHIPPING CONTAINERS 20 FT or 40 FT STACKING BARS SAFE STACKING OFFICES READ AD" is in sale since Friday, January 10, 2020. This item is in the category "Business, Office & Industrial\Material Handling\Shipping Containers".The seller is "welderjohn13" and is located in SOUTHAMPTON. This item can't be shipped, the buyer must pick up the item.