This is a genuine Western Digital 120GB 7200 RPM WD Caviar Enhanced IDE ATA 3.5 Hard Drive WD1200JB-00GVC0 WD1200. In very good condition, pulled from a Tower computer that got an upgrade. Like a lot of people, I also have a 9 to 5 job, so please expect me to mail the item after the day you have paid. Thank you.