The Rack Mount Solution for the HP xw4X00, HP Z2X0, and HP Z4X0 Workstations features a locking tray that secures to the workstation and adjustable fixed-rails that attach to the rack. This kit offers a low-profile design with minimal impact on space constraints, allowing for high density rack configurations. Highlighting flexibility and safety, the HP xw4X00/Z2X0/Z4X0 kit provides an affordable and simple rack mount solution for use with any of HP's current entry-level workstations.- HP Series-E.- Compaq 10000 Series Racks.- Some Rack enclosures with pre-threaded columns.- May work on other third party racks.