HP MB4000FCWDK - HP 4TB 3.5" SAS 7.2K 6Gb/s Hard Drive HP Original/OEM HP 4TB 3.5" SAS 7.2K 6Gb/s Hard Drive (HP Part Number: MB4000FCWDK). Inquire by email for larger quantities. Capacity: 4TB Form Factor: 3.5" Interface: SAS Speed: 7.2K Transfer Rate: 6Gb/s Tray Type :HS Drive Type: HDD