The 20ft office combo unit provides an 8×10 office and 8×10 storage. The insulated office includes an entry door, window, outlets, lighting, plan table and A/C. The units make great construction site offices with the added benefit of a storage room. These units can also be built as a full 20ft office or a combo office unit in a 40ft container. Just let us know what you need and we’ll work out a solution!