The product is a lot of 20 SK Hynix 8GB 1Rx8 PC4-2666 DDR4 SODIMM modules, totaling 160GB of memory capacity. Each module has a capacity of 8GB and a bus speed of PC4-21300 (DDR4-2666). These modules have been tested and confirmed to be in working condition. They are designed for use in computers and laptops, providing reliable and high-performance memory for various tasks and applications. Made in the United States, these SK Hynix modules offer quality and stability for improving the efficiency and speed of your computer system.