Aerocool Syclone II. Material: SECC. Front fans installed: 1x 140 mm, Front fans diameters supported: 140 mm, Rear fans installed: 1x 120 mm. Width: 270 mm, Depth: 525 mm, Height: 480 mm. Internal drive bays: 6 x 3.5", External drive bays: 4 x 5.25", Optional fans: 1 x 120/140 mm