This product is either discontinued or we cannot get that from suppliers.
Kingston KVR26N19S8/16BK DIMM Memory, Capacity 16 GB, DDR4 SDRAM, Speed 2666 MHz, Non-ECC, CAS Latency 19, 288-pin, FF DIMM.
Kingston 16gb 2666mhz Ddr4 Non-ecc Cl19 Dimm 1rx8 (KVR26N19S8/16BK).