iStarUSA DN-300-50R8PD8 Black SGCC 1.0mm 3U Rackmount 3-Bay Compact microATX Chassis with 500W Redundant Power Supply 500W Redundant 3 External 5.25 Drive Bays Motherboard Compatibility: 9.6 x 9.6 (microATX, mini-ITX) Power Supply: 500W Redundant External 5.25 Drive Bays: 3 Internal 3.5 Drive Bays: 4 Expansion Slots: 4 Front Ports: 2 x USB 3.0 Dimensions (H x W x D): 5.25 x 18.98 x 19.26