This item is for one Western Digital WD5000BMVW-11A
You will get this exact item with these exact details:
Western Digital (15 hrs)
Model: WD5000BMVW-11AMCS4
DCM: SA0TJAN
SN: WX81E32VJD77
Date: 02AUG2012
Product of Malaysia
Cap: 500gb
USB
Board number on label: 771814-901 AC
Board number on PCB: 2060-771814-001 REV A