PC Case Key Specifications: ATX Middle Tower Case ATX / MICRO ATX , P4 M / B Support USB 2.0 + Audio Material: SGCC or SECC Thickness: 0.5 mm , 0.6 mm Drivebays: 4 * 5.25 ( External ) 2 * 3.5 ( External ) 5 * 3.5 ( Internal ) Expansion Slot: 7 2 * 8 cm Fan optional in the back 1 * 8 cm / 9 cm / 12 cm Fan in the front Air duct optional, Handle optional Side Window optional Case Dimensions: 465 * 180 * 410 ( D * W * H, mm ) Package: 509 * 222 * 455 ( D * W * H , mm ) 1 * 40' HQ : 1300 pcs