The Seagate Cheetah 300GB 15K.5 HDD, model ST3300655SS, is a high-performance 3.5-inch internal hard drive with a storage capacity of 300GB. With a rotation speed of 15000 RPM, this HDD offers fast data access and transfer speeds. The drive is designed for use with servers and other high-performance computing systems, and it is backed by a 1-year manufacturer warranty from Better Micro, Inc. Ideal for demanding applications that require reliable and efficient storage solutions.