This product is either discontinued or we cannot get that from suppliers.
Kingston KVR26N19D8/16BK DIMM Memory, Capacity 16GB, 1 Module, Speed 2666MHz (PC4-21300), Non-ECC, CAS Latency 19, FF DDR4, 1R (Single Rank), 288 Pin, Memory Voltage 1.2v.
Kingston 16gb 2666mhz Ddr4 Non-ecc Cl19 Dimm 2rx8 (KVR26N19D8/16BK).