Specifications: ATX MIDDLE TOWER CASE ATX/MICRO ATX. P4M/B SUPPORT USB2.0+AUDIO MATERIAL: SGCC OR SECC THICKNESS : 0.5MM, 0.6MM DRIVEHAYS: 4X5.25(EXTERNAL) 2X3.5(EXTERNAL) 5X3.5(INTERNAL) EXPANSION SLOTS:7 2 X 8CM FAN OPTIONAL ON BACK 1x 8CM/ 9CM/12CM FAN OPTIONAL ON FRONT AIR DUCT OPTIONAL, HANDLE OPTIONAL