Western Digital HD Caviar 160GB, SATAII, 20pk. Hard drive capacity: 160 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Power consumption (standby): 1.60 W. Weight: 730 g, Height: 25.4 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 65 °C, Operating relative humidity range: 5 - 95 %