Thermaltake Urban T31 Mid-Tower Chassis Cases CA-1A5-00M1WN-00 Case Type: Mid Tower Material: SECC External Bay: 3x 5.25" (1x 3.5",?Converted from one 5.25" drive bay) Internal 3.5" Drive Bays: 6 x 3.5" or 2.5" (HDD Docking : 1 x 3.5" or 2.5") Expansion Slots: 7 Front I/O Panel: 2x USB 3.0 Ports, 2x USB 2.0 Ports, 1x HD Audio