4U Standard Chassis 10 x 3.5\" HDD + 3x 5.25\" BaysProduct Features:- 4U rackmount design,meets EIARS-310C standard.- 3 x 5.25\" drive bays, 10 x 3.5 \" drive bays- Support EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\") motherboard- Rigid top cover- 2 x 120mm front fans, 4 x 80mm fans in mid wall and 2 optional 80mm rear exhaust fans.- Lockable front panel door- Front accessible USB ports- Easy-accessed front changeable air filter- Smooth border prevent lacerating your skinSpecifications: - Drive Bay: Supports ten 3.5\" drives and three 5.25\"drives- Air Filter:easy accessed, changeable- Cooling Fan: fitted with 2 x 120mm front fans and 4 x 80mm fans in mid wall. Optional 2 x 80mm rear exhaust fans.- Switch: Power ON/OFF x 1, System reset x 1- Indicator:Power ON/OFF x 1, HDD x 1, NETWORK X 2- Connector: 2 x front accessible USB port- Motherboard Compatibility: Support EEB (12\"x13\")?, CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\")- Expansion: 7 x full height PCI expansion slots- Power Supply Options: Standard ATX or redundant 1U or redundant 2U power supply- Dimensions ( W x D x H ): 19\" x 21.6\" x 7\" (430mm x 650mm x 176mm) x 13.0Kg net- 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)- Carton Size: 260mm x 248mm x 730mm x 15kg gross