The Kingston KVR-PC 100/128 -R 128mb 100 MHz SDRAM ValueRAM DIMM is a memory upgrade module designed for computer systems. With a total capacity of 128 MB, this DIMM module has a bus speed of PC-100 and contains 168 pins. As a single module, it offers 128 MB of capacity and is ideal for increasing the memory capacity of a computer system. This product is part of the Kingston brand's range of memory products, known for their reliability and performance in the field of computer components.