The Linea Modular Shelving System From BDI uses a single shelf on its own or combining multiple units to create a complete wall system or room divider, Linea Shelves provide a versatile combination of open and enclosed storage. Using the following four models, create an endless number of combinations. Start with a single ( 5801) or double-width shelf unit (5802), then add on additional units 5801A / 5802A as needed to create shelving systems or room dividers of practically any size.