This listing is for a pair of Hynix 1GB DDR2 PC2-5300U desktop RAM modules, totaling 2GB. These unbuffered, non-ECC memory sticks operate at a bus speed of 667MHz, making them suitable for compatible desktop systems. They are standard 240-pin DIMM modules, assembled in China. Ideal for upgrading or replacing existing memory in older desktop computers. Please verify compatibility with your motherboard before purchasing.