2U Rack
The sizing of rackmount systems is defined by the term “U”. 1 Rack Unit or 1U is 1.75 inches (44.45 mm) high, so 2U Rack will be 3.5 Inches (88.9 mm) RS stock a range of 2U rackmount cases from suppliers such as nVent -Schroff, Metcase, Hammond and RS Pro.