This is a mechanical HDD drive with a 450 GB storage capacity. The form factor of this hard drive is 3.5".
DELL T857K internal hard drive 3.5" 450 GB SAS -
Compadvance
DELL 450GB
Athema Services
dell 450gb sas6, 15k, 26.1mm, 64, seagate lightning 450gb sas t857k