Use the DAP-19 to allow for a shorter 5000FD/FDL Series door, to be mounted on a taller cabinet (i.e. a 70" door on a 77" cabinet). This application is typical of installations that require rear wiring access.Unit will support the door by serving as the upper or lower closure panel.Model uses 1 rack unit for installation.A separate fill panel may also be ordered to cover excess space.