1GB ACER Aspire 4520 4520G 4720Z 4420 DDR2 Memory RAM  2 STICKS OF 512MB --TOTAL 1GB TESTED -- 100% Functional ==   YOU WILL RECEIVE RAM PULLED FROM ACER 4520  BUT SHOULD BE COMPATIBILE WITH MOST LAPTOPS THAT USE DDR2 CHIP.      If for some reason you are not satisfied with received item, e-mail us through eBay message system. Don't leave negative feedback, money back guaranteed! We value your time and business.   EXACT ITEM PICTURED