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 CEB(12" x 10.5"), ATX (12" x 9.6"), Micro ATX (9.6" x 9.6"), Mini-ITX (6.7" x 6.7")motherboard- 4x 80mm ball bearing fans wall for better ventilation- 7 x low profile PCI expansion slots. (Also available with 3 x full height PCI slots)?- Front USB ports- Can be fitted with 3 x 3.5" Hot Swap bays if using SC-H300 fitted in the 2 x 5.25" Bays?Specifications:- Drive Bay: Supports six 3.5" drives and two 5.25"drives- Cooling Fan: 4 x 80mm middle fans- 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 accessible USB ports- PCI Expansion: 7 x low profile PCI expansion slots. (Also available with 3 x full height PCI slots)?- Motherboard Compatibility: Support 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, standard 2U power supply,- Dimensions ( W x D x H ): 19" x 21.6" x 3.5" (483mm x 550mm x 88mm)- Packing:Double boxes- Weight: 8.4 kg/18.5 lb (NET) 10.8 kg/23.8 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)