The 2 Post rack shelf is compatible with most 19" EIA standard 2 Post rack. This 2 Post rack shelf has a 300 lb (136 kgs) equipment capacity and will support a wide variety of electronic equipment. Electronic devices up to 21" (533 mm) deep can be supported on a 2 Post rack shelf. Transport and seismic options are available for the 2 Post rack shelf if the installation requires.