Seventy-five pounds of P2-grade MDF and particle board is what gives this 72-in cabinet its solidity, and each layer carries 45 lbs. Three open shelves handle files, printers and office supplies while a cabinet at the base closes off whatever should not be seen. Shelf heights adjust during assembly to suit the equipment being stored. The unit measures 29 x 14 x 72 in. A gray painted finish suits a home office or a study where white would show marks around the door handles.