A 5U high by 10U wide (222.25x444.5mm) 3mm thick high grade 5251 H22 aluminium back panel for use with our laser engraved front panel 7215-574 for the MIDI Ultimate. We manufacture these panels in-house on our CNC router and are supplied ready for use. The panel is also pre-tapped with fixing holes for the main PCB 7215-074.