• Drive bays: 2 x 3.5-inch HDD ,1 custom-made I/O• M/B size:MAX ATX 2×6.5-inch*8-inch• Cooling fans: 3x 4028(STD) • Steel thickness: 1.2mm SGCC • Riser card: 3 to 3 32-bit PCI (optional) • USB port: 2 USB in front panel• Colors: Steel color • PSU: Length180 or 200 or 205mm dedicated the 1U specifications power supply • Dimensions(W*D*H): 430 mmx 680 mmx 44mm