This product is either discontinued or we cannot get that from suppliers.
WD WD141KFGXSSD, Capacity 14TB Red PRO, 3.5" IntelliPower, SATA3 NAS Hard Drive, 14TB, 256MB, Form Factor3.5", SATA 6GB/s, RPM 7,200.
Designed specifically with medium or large scale business customers in mind, WD Red Pro drives are available for up to 24-bay NAS systems. Engineered to handle high-intensity workloads1 in 24x7 environments.