This product is either discontinued or we cannot get that from suppliers.
Kingston KVR26S19S8/16, 16GB, Speed 2666MHz (PC4-21300), Non-ECC, SODIMM, CAS Latency 19, DDR4, 1R (Single Rank), 260 Pin.
This document describes ValueRAM's KVR26S19S8/16 is a 2G x 64-bit (16GB) DDR4-2666 CL19 SDRAM (Synchronous DRAM), 1Rx8, non-ECC, memory module, based on eight 2G x 8-bit FBGA components.