This product is a lot of 12 Samsung/Micron 16GB PC3L-10600R server memory modules, with a total capacity of 192GB. Each module has a capacity of 16GB and they are DDR3 SDRAM type with a bus speed of PC3-10600 (DDR3-1333). They have a form factor of DIMM and 240 pins. These memory modules are designed for server use and provide high performance and reliability for enterprise networking and server applications.