Furniture Design 4 in 1 System Storage Unit by ZIEL HOME FURNISHING TECHNOLOGY CO.,LTD 4 in 1 System is a modular storage system designed for offices and homes. The design uses minimal materials to form a four plus one cube frame. Each basic unit can be expanded horizontally or vertically. Metal pipes form the main frame, and solid wood partitions or sheet metal panels can be added to create closed cabinets for private items. Shelf spacing is adjusted with metal support rods and plastic buckles. Assembly and rearrangement need no tools. A range of accessories allows configurations for changing storage needs.