The product is a set of 4 pieces of RAM, with a total capacity of 128 MB. The RAM modules are from various brands such as HP, Samsung, and Dane-Elec, with a form factor of DIMM. The RAM is designed for desktop PCs and has a bus speed of PC-133. Each module has a capacity ranging from each other and a total of 23 modules are included in the set. These RAM modules are made in China and have 168 pins for proper installation in the computer.