1GB DDR2 PC2-4200R ECC Registered memory sticks for HP server. HP part number AB564AX.They're fully tested and we provide 14 days money back warranty.Shipping &Handling fees is free to United States by Post Airmail and it generally takes within 10 work days to arrive its destination with tracking service. Other areas worldwide will be charged for shipping & handling fees and it usually cost around two weeks to go to Europe and Australia . But we still experienced more than a month to deliver our item using Post Airmail. Pls email me on other areas or other shipping arrangment.Only Paypal payment accepted. Thanks for understanding.