The IBM Thinkpad Slim HDD Adapter with 20GB Hard Drive is a 2.5-inch internal laptop drive designed for use with IBM Thinkpad laptops. This adapter comes with a 20GB hard drive and is compatible with select models. The sleek silver color and compact form factor make it ideal for those looking to upgrade their laptop's storage capacity. It is a reliable and high-quality product that is essential for anyone in need of additional storage space on their laptop.