The Samsung 256MB PC100 SDR SDRAM 168-Pin DIMM is a high-quality memory module designed for use in computers. With a total capacity of 256MB and unbuffered memory features, this Samsung DIMM is a reliable choice for upgrading your system's memory. The module is 133mm long, 30mm high, and 4mm wide, with a bus speed of PC100. It comes with one module and 168 pins, making it compatible with a variety of computer systems. This product does not come with a manufacturer warranty, but its quality and performance are backed by Samsung's reputation for excellence in memory technology.