N7907A rack mount kit can be used for all N6900 and N7900 power supplies, regardless if they are 1 kW or 2 kW form factors. It can also be used for mounting the N7909A. N7907A APS rack mount kit is needed for every APS power supply or N7909A dissipater that you would like to mount.
The N7907A is intended for use in a 19-inch EIA rack cabinet. APS power supplies and power dissipater units can be mounted directly above or below each other without any worry of heat problems.
Rack Ear and Slide Accessory Kit - everything needed for mounting 1 kW models, 2 kW models, and the power dissipator in 19-inch EIA cabinets.