Pro-Linea has all the elements to create a modern and refined work environment. The clean lines of this collection bring a fresh look without compromising functionality and durability. The doors can be installed on the 2-shelf bookcase (model 120160) or on the credenza (model number 120612). If the doors are used with the credenza (model number 120612), they can be installed on the left side or on the right side but only one 2-door set can be installed (either left or right). This unit meets or exceeds ANSI/BIFMA performance standards.