This product is either discontinued or we cannot get that from suppliers.
WESTERN DIGITAL WD Red, Bare Drive, SATA 6.0Gb/s, 6TB, 5400 RPM, 64MB, Form factor 3.5".
This B&H Kit includes four 6TB Network HDD Retail Kits from WD each featuring a WD Red internal HDD equipped with a SATA 6 Gb/s interface along with a large 6TB storage capacity giving you fast access to a large amount of data.