Kingston 2GB Kit (2 X 1GB) PC2-4200 DDR2-533MHz ECC Fully Buffered CL4 240-Pin DIMM Memory Module (KTD-WS533/2G 9965286-091). This is a seller refurbished part in great working condition. May show signs of cosmetic wear but this should not interfere with the effectiveness of the product. Taken from a working environment.