The product is a lot of 2 Samsung 16GB PC4-2666V-RC2 DDR4 Server RAM Memory modules. Each module has a total capacity of 16GB, with a form factor of RDIMM and a DDR4 SDRAM type. Designed for server use, these memory modules feature ECC memory, registered technology, and fully buffered capabilities. With a bus speed of PC4-21300 (DDR4-2666), this product is ideal for enhancing the performance and efficiency of server systems in enterprise networking and server applications.