You are Buying a Fujitsu MBA3073NC 73Gb 15k RPM Ultra 320 SCSI SCA2 LVD Hard Drive 0DP283 Exactly as You See It in the Pictures.
You are Buying 1 but there are 2 Hard Drives If you want them 2 you can buy the second one too, hence the second pic with different serial number
FREE Shipping ONLY to the Contiguous 48 States. If You Need Faster Shipping or Want a Specific Provider Please Pay for the Service once You Pay for the Item and Let Me Know.
Feel Free to Ask Any Question BEFORE Buying. Do Not Assume Anything. If is Not in the Pictures is Not Included.
Here is more info Ifound online:

Fujitsu 73GB 15K U320 80pin SCA-2 SCSI Hard Drive RoHS Compliant MBA3073NC

Fujitsu's latest generation 15K RPM Enterprise Hard Disk Drives (MBA Series) continue to represent some of the fastest enterprise 3.5-inch hard disk drives in the industry. Leveraging our technology expertise and heritage, we deliver reliable, high-capacity HDDs for your customer’s most demanding storage applications.

With 73GB capacity points this latest drive technoogy offers low power consumption, high reliability, and faster internal data rates. Interface options include 3Gb/sec SAS, 68/80-pin U320 SCSI and 4Gb/sec Fibre Channel.

Leading edge technology enables industry leading performance specifications blended with the latest advances in interface technology. This provides a flexible and cost effective storage solution for your most demanding applications including rack and tower servers, storage arrays, RAID systems and digital video systems.

DPN: DP283 / 0DP283

NOTE: Info on the Items is Founded Online, I'm Not Responsible for ANY Errors Inaccuracy or Typos. PLEASE Do Your Own Research Before Buying. Thanks!