The 40-D240-R19-H is a rack-mount kit that allows the Sun StorEdge D240 to be rack-mounted into almost any EIA 19" standard computer cabinet in only 2RU (RU=1.75") of computer cabinet space. The unit has two “U" shaped sides, which mount to the rails of a computer cabinet. The StorEdge D240 unit slides into the “U" and a single screw at the back locks the system into the computer cabinet. The kit has a flexible mounting depth range of 24" to 36".