Fractal Design Core 1000 USB 3.0 Cases FD-CA-CORE-1000-USB3-BL 3 fan slots 1 x 120mm filtered in front, 1 x 92mm in rear, 1 x 120mm included Innovative, easily removable HDD-tray which mounts the HDD's vertically with anti vibration silicone grommets 2 x 3.5 inch HDD trays or 3x 2.5" SSD