The product is a lot of 4 Samsung M393B2G70BH0-YK0 16GB PC3L-12800R ECC server memory RAM modules. These DDR3 SDRAM modules have a total capacity of 64GB (4 * 16GB) and are designed for servers with a bus speed of PC3-12800 (DDR3-1600). The memory modules feature ECC memory and are registered, making them suitable for high-performance server applications. With 240 pins, these DIMM modules from Samsung offer reliable and efficient memory performance for servers in enterprise networking and server components.