This product is a bulk lot of 20 units of 8GB DDR4 laptop RAM from various reputable brands such as Samsung and Hynix. Each module has a capacity of 8GB, with a total capacity of 160GB for the entire lot. The RAM is designed in SO-DIMM form factor with a DDR4 SDRAM type, suitable for laptops. With a bus speed of PC4-17000 (DDR4-2133) and 240 pins, this RAM is compatible with a wide range of laptops and can help improve the performance and efficiency of your computer.