Cooler Master Centurion 5 ATX Mid Tower Case Blue- (CAC-T05-UB) The COOLER MASTER Centurion 5 features five external 5.25" drive bays, and one external and four internal 3.5" drive bays for superior expandability. The 120mm rear fan delivers optimum cooling performance and is ultra-quiet, too! The COOLER MASTER Centurion 5's front I/O panel enables remarkably convenient access to two USB 2.0 ports, one IEEE 1394 ports and two audio ports. Tool-free assembly/disassembly for quick and maintenance or upgrade Special perforated screen design provides the superior airflow and maximum cooling performance; easy to clean and maintain