Model O11 AIR Case Type Tower Chassis Structure Dual chamber Color Black Material (Front)Plastic (Side)Tempered Glass (Body)0.8mm SECC Expansion Slot 8 2.5" SSD 6 3.5" HDD 3 I/O Ports USB3.0 x2 , USB3.1 Type-C x1 , HD Audio M/B Type E-ATX / ATX / Micro-ATX Fan 2x 120mm PWM fans included and 1x120mm fan option or 140mm x 2 on the top (option) , middle 3x 120 mm (option),bottom 3x120mm(option), Front 3x120mm Radiator 120x 360mm / 120x 240mm / 140x 280mm VGA Card length is less than or equal to 420mm , height is less than or equal to 159mm CPU Cooling is less than or equal to 155mm PSU 2 (Optional)(L)210mm to 255mm(max) Filter (Top) x1(Side) x2, (Bottom) x1, (Front) x1 Item Dimension (L inchxW inchxH inch) 21 x 15 x 23