Seagate Momentus 160 GB SATA 2.5 Inch 5400 RPM Version 4 Laptop Internal Hard Drive ST9160310AS 5,400 RPM Spin Speed, 8 MB Cache Buffer SATA 3.0Gb/s Interface, 160 GB Capacity Average latency 5.6 msec, Random read seek time 14 msec Best-Fit Applications; Mainstream laptops, External storage solutions/boxes, Whitebooks, Industrial applications requiring a smaller form factor 3 Year Warranty