Rackmount Chassis - Rack-mountable - Atx;ceb;micro Atx - Front Control Power On/ Case Type: 4U Rackmount Material: 1.2mm ABS-HB SGCC M/B Type: Micro-ATX(9.6 x 9.6 inch); ATX (12 x 9.6 inch); CEB (12 x 10.5 inch); EEB (12 x13 inch) Processor Support: Intel / AMD UP Quad; Intel / AMD DP Quad External Bay: 3x 5.25", 2x 3.5" Internal Bay: 4x 3.5"1x Slim ODD(or 2.5" HDD kit) Expansion Slots: 7 Cooling System: 1x 120x25 mm Front Fan; Optional 2x 80x25 mm Rear Fans