Rosewill Aluminum 3.5-Inch USB 2.0 External Enclosure Cooling RX355-U Black Size: 3.5" Internal Interface: IDE External Interface: USB 2.0 Maximum Capacity (per Bay): Up to 750GB Drive Type: horizontal or vertical position Transfer Rate: up to 480 Mb/sec. via USB 2.0 Structure:Aluminum body w/ partial plastic Removable 80 mm fan kit