Inter-Tech CobaNitrox S-2501 Creative. Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA, Serial ATA II. Compatible operating systems: Win98/SE, Win 2000/ME, XP, Vista MAC OS 8.6+. Dimensions (WxDxH): 76 x 136 x 19 mm, Weight: 60 g. Material: Synthetic