This is a vintage Toshiba ND-3565GR 3.5" internal desktop disk drive in gray color. It is compatible with PCs and comes as a single unit. The drive has been tested and confirmed to be in working condition. With a form factor of 3.5 inches, this Toshiba model is designed for use in desktop computers, providing storage for files and data. It falls under the category of internal hard disk drives and is suitable for those seeking a reliable storage solution for their PC.