The ThinkPad 2nd Hard Drive Adapter for Ultrabay Slim gives you maximum storage flexibility with your ThinkPad R50, R50p, R51, R52, T40, T40p, T41, T41p, T42, T42p, T43, and T43p Series systems. This adapter lets you add a second HD to the Ultrabay Slim bay of your ThinkPad R50, R50p, R51, R52, T40, T40p, T41, T41p, T42, T42p, T43, and T43P Series system. With a second HD in your Ultrabay Slim bay, you have a quick way to store and back up critical data.<br><br><b>Features:</b><br><br>- Enables HD expansion in the ThinkPad Ultrabay Slim bay<br>- Includes drive cloning software