The Lenovo 4XF1W44946 is an official TS Enterprise Dual Drive Internal Enclosure and internal storage mounting kit for the Lenovo ThinkStation P5 Gen 2 workstation. The bracket and enclosure supports the installation of up to two additional 3.5-inch or 2.5-inch drives within the workstation’s internal drive bays. Compatibility: Lenovo ThinkStation P5 Gen 2.