Dell Enterprise Class SATA SFF 2.5-inch, 1TB, 7200 RPM Hard Drive with Tray for Select PowerEdge and PowerVault Systems. PN: WF12F Dell Certified Enterprise Class SATA Hard Drive For Poweredge and Powervault Systems Form Factor: SFF (2.5-inch Hard Drive) Equipped W/ Tray. Please mention server model in your order to get the right tray.