This product is a lot of 4 4GB DDR3L-1600 PC3L-12800S SO-DIMM non-ECC memory modules from Micron. With a total capacity of 16GB and form factor of SO-DIMM, these modules are designed for desktop or laptop computers. The modules have a 1-month manufacturer warranty, and each module has a length of 2.67 inches, height of 0.35 inches, and width of 1.18 inches. The DDR3 SDRAM technology ensures fast and reliable performance, making them a great choice for upgrading your computer's memory capacity.