The Rackmount Box is ideal for storing all the stuff that you would usually sit on top of some equipment in the Server Rack. The Rackmount Box is available in three different sizes ranging from 2U to 4U. There are also additional models available with lockable front doors. These models can be used to store various items such as small laptops. A Lockable Rackmount Drawer is available that slides out a full 9.5" (241 mm).