This is a STEC 2GB 2Rx* PC2-5300R CL5 Dimm Memory Module. Its STEC part number is ASJ72P8W256M8M-B03GYU. These modules were pulled from working systems, cleaned, tested, and packaged for sale. Please keep in mind that these are used memory modules and may show some signs of normal wear and tear. We are guaranteeing them as working for 30 days from the date of purchase.