This product is either discontinued or we cannot get that from suppliers.
Dell 400-ATIR Hot-Plug Drive 3.5" Hybrid Carrier (400-ATIR), Capacity 900GB, Serial Attached SCSI (SAS), Internal, 15000RPM, Y004G 3.5 to 2.5 Tray Adapter.
Increase the storage capacity of your system with the 900GB Hard Drive from Dell. Offering a rotational speed of 15,000 RPM, this drive provides fast disk access. Featuring SAS interface.