4U Standard Chassis 6x 3.5\" HDD + 2x 5.25\" BaysFeatures:- 4U rackmount design,meets EIARS-310C standard.- Super short depth, only 15.74 inch (400mm)- 2 x 5.25\" drive bays, 6 x 3.5 \" drive bays- Additional 3 x 3.5\" Hot Swap HDD available using SC-H300 in the 2 x 5.25\" Drives- Easy HDD drive mounting with screwless rails- Support EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), ITX (6.7\" x 6.7\") motherboard- 7 x PCI Expansion Slots- 2x80mm rear ball bearing fans for better ventilation- Two front USB ports- Smooth border prevent lacerating your skinSpecifications:- Drive Bay: Supports six 3.5\" drives and two 5.25\" drives. Additional 3 x 3.5\" Hot Swap HDD available using SC-H300 in the 2 x 5.25\" Drives?- Cooling Fan: 2 x 80mm rear ball bearing 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 USB ports- Motherboard Compatibility: Support EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), ITX (6.7\" x 6.7\")- PCI Expansion: 7 x PCI Expansion Slots (maximum PCI card length 200mm).- Power Supply Options: Standard ATX, mini redundant power supply- Dimensions ( W x D x H ): 19\" x 15.74\" x 7\" (483mm x 400mm x 176mm)- Packing:Double boxes- Weight: 6 kg/13 lb (NET) 8 kg/17.5 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)?