Macally FireWire External Enclosure. Disk drive: 88.9 mm (3.5 "). System requirements: Desktop/notebook + FireWire., Mac OS 9.2/Mac OS 10.1.5/Mac OS 10.2/Mac OS 10.3/Mac OS 10.4.. Colour: Silver. Weight & dimensions: 17.06 x 28.54 x 5.9 mm, 17.06 mm, 28.54 mm, 5.9 mm. Material: Aluminium