2U Standard Chassis 6 x 3.5\" HDD + 2x 5.25\" BaysFeatures:- 2U rackmount design,meets EIARS-310C standard.- 2 x 5.25\" drive bays, 6 x 3.5 \" drive bays- Support EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), Mini-ITX (6.7\" x 6.7\") motherboard- 4 x 80mm ball bearing middle fans wall for better ventilation (Optional rear 60mm fan, see specification)- 2 x Front USB ports- 7 x low profile PCI expansion slots. (Also available with 3 x full height PCI slots)- Support Standard ATX power supply, standard 2U power supply- Can be fitted with 3 x 3.5\" Hot Swap bays if using SC-H300 fitted in the 2 x 5.25\" BaysSpecifications:- Drive Bay: Supports six 3.5\" drives and two 5.25\" drives- Cooling Fan: 4 x 80mm middle fans in centre fan wall. (if using a front mounted ATX PSU an optional 60mm rear exhaust fan can be fitted)- Switch: Power ON/OFF x 1, System reset x 1- Indicator:Power ON/OFF x 1, HDD x 1, NETWORK X 2- Connector:Two front USB 2.0 ports- Motherboard Compatibility: Support EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), Mini-ITX (6.7\" x 6.7\")- Power Supply Options: Standard ATX PS/2 front mounted power supply or standard 2U rear mounted power supply- PCI Expansion: 7 x low profile PCI expansion slots. (Also available with 3 x full height PCI slots)- Dimensions ( W x D x H ): 19\" x 25.5\" x 3.5\" (483mm x 650mm x 88mm)- Packing:Double boxes- Weight: 9.4 kg/20.7 lb (NET) 12 kg/26.5 lb (GROSS)- Environment Temperature:0/55 C, 32/131 F (Operating) -20/60 C, -4/140 F (Non-Operating)- Relative Humidity: 5% to 95%,non-condensing- Vibration ( 5-500 Hz ):1 Grms (Operating), 2 G (Non-Operating)- Shock : 10 G(with 11ms duration, half sine wave) (Operating), 30 G (Non-Operating)?