Chenbro 272755 RM RM42200-1U3 4U IPC Chassis 15-Slot Rear Window Brown Case MPN: RM42200-1 Item Weight: 34 lbs Manufacturer: CHENBRO Specifications: Manufacturer Part Number: RM42200-1 Case Type: 4U Rackmount Material: 0.047 in ABS-HB SGCC M/B Type: CEB (12 x 10.5 inch); ATX (12 x 9.6 inch) Processor: UP P4 / LGA775 (Intel); DP Nocona (Intel); DP Opteron (AMD) Drive Bays: 8 External Bay: 3x 5.25, 2x 3.5 Internal Bay: 3x 3.5 Expansion Slots: 7 Cooling System: 1 x 4.724 in (3P3C) front fan w/filter; optional 0.079 x 3.150 in rear fans Front Panel I/O: 2 x USB2.0 ports Power Supply: None, support PS2 single/mini redundant power supply Add-on Card Retainer Dimensions (W x D x H): 16.9 x 20.5 x 6.9 inch / 430 x 522 x 176 mm Weight: 29.5 lbs