This HGST Ultrastar 7K4000 is a high-quality internal desktop drive with a storage capacity of 3 TB and a SAS 2 interface. It is compatible with PCs and designed for enterprise use. The hard drive form factor is 3.5 inches and it has a cache size of 64 MB. The drive is silver in color, with a length of 6 inches, a width of 4 inches, and a height of 1 inch. It has a rotation speed of 7200 RPM and is designed for HDD drive types. The product contains a chemical known to the State of California to cause cancer, as indicated by the California Prop 65 Warning. This unit is ideal for those in need of reliable storage solutions.