The Keysight N6709C Rack Mount Kit - provides all the necessary hardware to rack mount one N6700C, N6701C, or N6702C modular system power supply in 1 U rack space. This rackmount kit includes front rack ears and rear supports that take the place of standard rack rails or slides. Note Standard rack rails and slides are not compatible with the N6700 Series as they block the air inlets on the side of the mainframe. The N6709C rack mount kit is also orderable as option 908 on any N6700 Series modular system power supply. Rack Mount Kit for Low-Profile Modular Power System Mainframes.