Description: Model NO. U1200N4000 Standard EIA-RS310D Dimension 481mm x 494mm x 1U (W x D x H) (18.9” x 19.5” x 1.7”) Material SGCC / 1.0mm thickness, Aluminum front plate M/B MICRO ATX (9.6” X 9.6”) Drive bays 3.5” HDD x4 Coolings 3x 4cm Indicators Power, HDD LED Controls Power on/off, USB2.0/3.0(OPT) port x 2 Slots 1 (PCI or PCI-E) Power Supply 1U Flex PSU