This mixed lot of three Western Digital laptop hard drives includes the Caviar and Raptor models with storage capacities of 360GB, 800GB, and 1600GB respectively. They are compatible with laptops and have a 2.5 inch form factor, making them easy to install. These internal desktop drives support HDD drive types, operate at 5400 RPM, have a 32MB cache, and use the SATA III interface. The drives are black and part of the WD Blue product line. This lot is a great investment for anyone in need of additional storage for their laptop.