Furniture Design 4 in 1 System Storage Unit by ZIEL HOME FURNISHING TECHNOLOGY CO.,LTD The modular storage system provides a simple and flexible storage solution. It uses minimal materials to form a 4+1 cube frame. The 4+1 basic storage unit can be freely expanded horizontally or vertically out of the box. The system can provide reliable storage solutions for offices and residences. In terms of experience, it is easy to install or redecorate storage units without using tools. In addition, the storage system has a large number of accessories available.