500GB 7200RPM Hard Disk Drive Kit for Panasonic Toughbook C1 MK1.  Genuine Panasonic Replacement Hard drive CF-KC1HD5011

This hard drive comes in the caddy case made by Panasonic to fit the Toughbook.  It will be an exact replacement of the hard drive that originally came with the laptop so you can slide the old drive out and slide this new drive in.