The Agilent N6700 Low-Profile Modular Power System simplifies test-system assembly, programming, debugging and operation. It's flexibility, small size, and fast command processing time make it ideal for ATE and production test environments. For proper operation of the N6700A or N6700B Low-Profile Modular Power System Mainframe, any empty slots must be filled with a filler panel. This N6708A filler panel kit is a pack of 3 filler panels, so each kit can fill 3 empty slots.