This product is a lot of 58 Micron 16GB RAM modules, each with a total capacity of 16GB and a bus speed of PC3-12800 (DDR3-1600). These DDR3 SDRAM modules are designed for high performance and reliability in computer systems. With a variety of memory features such as ECC memory and registered functionality, these modules are ideal for demanding applications that require precise and efficient memory management. Perfect for boosting the performance of your computer, these memory modules are a valuable addition to your system.