NORCO RPC-450TH Black 4U Rackmount Server Chassis 3 External 5.25 Drive Bays Motherboard Compatibility: ATX (12x9.6), Micro ATX (9.6 x 9.6) External 5.25 Drive Bays: 3 Hot-Swap Drive Bays: 10 SATA or SAS Front Ports: USB 80mm Fans: 2 Dimensions (H x W x D): 19 x 21.6 x 7 Weight: 40 lbs. (NET) Parts: 1 year limited