I built one of these to play my rack synth live. People liked it so I built another. The rack is customized for the Nord Lead 2 which is slightly under the standard 4U rack space. But it is a standard 19" across and pretty much any 4U synth will fit as long as the depth works. Depth is 3" in back. The keyboard is an Alesis Q25. I am including the power supply. Nord/Virus not included, only for display purposes. Let me know if you have any questions